21010929990372 has 240 divisors, whose sum is σ = 64045173679872. Its totient is φ = 5882249445120.

The previous prime is 21010929990367. The next prime is 21010929990373. The reversal of 21010929990372 is 27309992901012.

21010929990372 is a `hidden beast` number, since 2 + 1 + 0 + 10 + 92 + 99 + 90 + 372 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (21010929990373) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36096798 + ... + 36674250.

Almost surely, 2^{21010929990372} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21010929990372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32022586839936).

21010929990372 is an abundant number, since it is smaller than the sum of its proper divisors (43034243689500).

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

21010929990372 is a wasteful number, since it uses less digits than its factorization.

21010929990372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577800 (or 577789 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 21010929990372 in words is "twenty-one trillion, ten billion, nine hundred twenty-nine million, nine hundred ninety thousand, three hundred seventy-two".