21602162356992 has 360 divisors, whose sum is σ = 76816396774656. Its totient is φ = 5903695632384.

The previous prime is 21602162356933. The next prime is 21602162356993. The reversal of 21602162356992 is 29965326120612.

21602162356992 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 2 + 1 + 623 + 5 + 6 + 9 + 9 + 2 = 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 (21602162356993) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 103183 + ... + 6573809.

Almost surely, 2^{21602162356992} 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 21602162356992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38408198387328).

21602162356992 is an abundant number, since it is smaller than the sum of its proper divisors (55214234417664).

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

21602162356992 is an equidigital number, since it uses as much as digits as its factorization.

21602162356992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470685 (or 6470662 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 21602162356992 in words is "twenty-one trillion, six hundred two billion, one hundred sixty-two million, three hundred fifty-six thousand, nine hundred ninety-two".