21022630487040 has 2816 divisors, whose sum is σ = 91953278484480. Its totient is φ = 3973030871040.

The previous prime is 21022630486951. The next prime is 21022630487137. The reversal of 21022630487040 is 4078403622012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 21022630487040.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 77574282105 + ... + 77574282375.

Almost surely, 2^{21022630487040} is an apocalyptic number.

21022630487040 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 21022630487040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45976639242240).

21022630487040 is an abundant number, since it is smaller than the sum of its proper divisors (70930647997440).

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

21022630487040 is a wasteful number, since it uses less digits than its factorization.

21022630487040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 21022630487040 in words is "twenty-one trillion, twenty-two billion, six hundred thirty million, four hundred eighty-seven thousand, forty".