21534762351 has 16 divisors (see below), whose sum is σ = 29804663808. Its totient is φ = 13820700000.

The previous prime is 21534762349. The next prime is 21534762367. The reversal of 21534762351 is 15326743512.

It is not a de Polignac number, because 21534762351 - 2¹ = 21534762349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534762331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243275 + ... + 1260476.

It is an arithmetic number, because the mean of its divisors is an integer number (1862791488).

Almost surely, 2^21534762351 is an apocalyptic number.

21534762351 is a deficient number, since it is larger than the sum of its proper divisors (8269901457).

21534762351 is a wasteful number, since it uses less digits than its factorization.

21534762351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503862.

The product of its digits is 151200, while the sum is 39.

The spelling of 21534762351 in words is "twenty-one billion, five hundred thirty-four million, seven hundred sixty-two thousand, three hundred fifty-one".