21699023883264 has 440 divisors, whose sum is σ = 79750830930848. Its totient is φ = 5722817495040.

The previous prime is 21699023883241. The next prime is 21699023883287. The reversal of 21699023883264 is 46238832099612.

It is a happy number.

21699023883264 is a `hidden beast` number, since 2 + 1 + 69 + 9 + 0 + 238 + 83 + 264 = 666.

It is an interprime number because it is at equal distance from previous prime (21699023883241) and next prime (21699023883287).

It is a super-2 number, since 2×21699023883264² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6110484 + ... + 8985324.

Almost surely, 2^{21699023883264} is an apocalyptic number.

21699023883264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21699023883264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39875415465424).

21699023883264 is an abundant number, since it is smaller than the sum of its proper divisors (58051807047584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21699023883264 is a wasteful number, since it uses less digits than its factorization.

21699023883264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874893 (or 2874866 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 21699023883264 in words is "twenty-one trillion, six hundred ninety-nine billion, twenty-three million, eight hundred eighty-three thousand, two hundred sixty-four".