21140531032545 has 32 divisors (see below), whose sum is σ = 37583450461440. Its totient is φ = 11274864629760.

The previous prime is 21140531032501. The next prime is 21140531032559. The reversal of 21140531032545 is 54523013504112.

21140531032545 is a `hidden beast` number, since 2 + 1 + 1 + 4 + 0 + 5 + 3 + 103 + 2 + 545 = 666.

It is not a de Polignac number, because 21140531032545 - 2²² = 21140526838241 is a prime.

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, 19960732 + ... + 20993138.

It is an arithmetic number, because the mean of its divisors is an integer number (1174482826920).

Almost surely, 2^{21140531032545} is an apocalyptic number.

It is an amenable number.

21140531032545 is a deficient number, since it is larger than the sum of its proper divisors (16442919428895).

21140531032545 is a wasteful number, since it uses less digits than its factorization.

21140531032545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184102 (or 1184096 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 21140531032545 its reverse (54523013504112), we get a palindrome (75663544536657).

The spelling of 21140531032545 in words is "twenty-one trillion, one hundred forty billion, five hundred thirty-one million, thirty-two thousand, five hundred forty-five".