21355414120632 has 64 divisors (see below), whose sum is σ = 55169564083200. Its totient is φ = 6881491019520.

The previous prime is 21355414120571. The next prime is 21355414120633. The reversal of 21355414120632 is 23602141455312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355414120633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14619582 + ... + 16013837.

It is an arithmetic number, because the mean of its divisors is an integer number (862024438800).

Almost surely, 2^{21355414120632} is an apocalyptic number.

It is an amenable number.

21355414120632 is an abundant number, since it is smaller than the sum of its proper divisors (33814149962568).

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

21355414120632 is a wasteful number, since it uses less digits than its factorization.

21355414120632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30634396 (or 30634392 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 21355414120632 its reverse (23602141455312), we get a palindrome (44957555575944).

The spelling of 21355414120632 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred fourteen million, one hundred twenty thousand, six hundred thirty-two".