21533534014432 has 24 divisors (see below), whose sum is σ = 46248158281752. Its totient is φ = 9787970006400.

The previous prime is 21533534014427. The next prime is 21533534014477. The reversal of 21533534014432 is 23441043533512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30587405919 + ... + 30587406622.

It is an arithmetic number, because the mean of its divisors is an integer number (1927006595073).

Almost surely, 2^{21533534014432} is an apocalyptic number.

21533534014432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21533534014432 is an abundant number, since it is smaller than the sum of its proper divisors (24714624267320).

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

21533534014432 is a wasteful number, since it uses less digits than its factorization.

21533534014432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61174812562 (or 61174812554 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 21533534014432 its reverse (23441043533512), we get a palindrome (44974577547944).

The spelling of 21533534014432 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred thirty-four million, fourteen thousand, four hundred thirty-two".