21506142715332 has 96 divisors (see below), whose sum is σ = 54799426281600. Its totient is φ = 6510288230400.

The previous prime is 21506142715319. The next prime is 21506142715349. The reversal of 21506142715332 is 23351724160512.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 530615644 + ... + 530656172.

It is an arithmetic number, because the mean of its divisors is an integer number (570827357100).

Almost surely, 2^{21506142715332} is an apocalyptic number.

21506142715332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21506142715332 is an abundant number, since it is smaller than the sum of its proper divisors (33293283566268).

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

21506142715332 is a wasteful number, since it uses less digits than its factorization.

21506142715332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44597 (or 44595 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

Adding to 21506142715332 its reverse (23351724160512), we get a palindrome (44857866875844).

The spelling of 21506142715332 in words is "twenty-one trillion, five hundred six billion, one hundred forty-two million, seven hundred fifteen thousand, three hundred thirty-two".