21450132452511 has 80 divisors (see below), whose sum is σ = 38281137421824. Its totient is φ = 11703243030336.

The previous prime is 21450132452471. The next prime is 21450132452521. The reversal of 21450132452511 is 11525423105412.

21450132452511 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 0 + 132 + 4 + 5 + 2 + 511 = 666.

It is not a de Polignac number, because 21450132452511 - 2⁹ = 21450132451999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450132452521) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5787336 + ... + 8740338.

Almost surely, 2^{21450132452511} is an apocalyptic number.

21450132452511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21450132452511 is a deficient number, since it is larger than the sum of its proper divisors (16831004969313).

21450132452511 is a wasteful number, since it uses less digits than its factorization.

21450132452511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953602 (or 2953593 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 21450132452511 its reverse (11525423105412), we get a palindrome (32975555557923).

The spelling of 21450132452511 in words is "twenty-one trillion, four hundred fifty billion, one hundred thirty-two million, four hundred fifty-two thousand, five hundred eleven".