21964369320 has 128 divisors (see below), whose sum is σ = 73276416000. Its totient is φ = 5852217600.

The previous prime is 21964369313. The next prime is 21964369381. The reversal of 21964369320 is 2396346912.

21964369320 is a `hidden beast` number, since 2 + 196 + 436 + 9 + 3 + 20 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1373370 + ... + 1389270.

It is an arithmetic number, because the mean of its divisors is an integer number (572472000).

Almost surely, 2^21964369320 is an apocalyptic number.

21964369320 is a gapful number since it is divisible by the number (20) 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 21964369320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36638208000).

21964369320 is an abundant number, since it is smaller than the sum of its proper divisors (51312046680).

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

21964369320 is a wasteful number, since it uses less digits than its factorization.

21964369320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17200 (or 17190 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 21964369320 in words is "twenty-one billion, nine hundred sixty-four million, three hundred sixty-nine thousand, three hundred twenty".