21024161451 has 12 divisors (see below), whose sum is σ = 30369956760. Its totient is φ = 14015312160.

The previous prime is 21024161419. The next prime is 21024161461. The reversal of 21024161451 is 15416142012.

21024161451 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 41 + 614 + 5 + 1 = 666.

It is not a de Polignac number, because 21024161451 - 2⁵ = 21024161419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21024161461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132460 + ... + 244118.

It is an arithmetic number, because the mean of its divisors is an integer number (2530829730).

Almost surely, 2^21024161451 is an apocalyptic number.

21024161451 is a deficient number, since it is larger than the sum of its proper divisors (9345795309).

21024161451 is a wasteful number, since it uses less digits than its factorization.

21024161451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132586 (or 132583 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 21024161451 in words is "twenty-one billion, twenty-four million, one hundred sixty-one thousand, four hundred fifty-one".