21056125462 has 4 divisors (see below), whose sum is σ = 31584188196. Its totient is φ = 10528062730.

The previous prime is 21056125457. The next prime is 21056125469. The reversal of 21056125462 is 26452165012.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×21056125462³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21056125469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5264031364 + ... + 5264031367.

It is an arithmetic number, because the mean of its divisors is an integer number (7896047049).

Almost surely, 2^21056125462 is an apocalyptic number.

21056125462 is a deficient number, since it is larger than the sum of its proper divisors (10528062734).

21056125462 is a wasteful number, since it uses less digits than its factorization.

21056125462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528062733.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 21056125462 in words is "twenty-one billion, fifty-six million, one hundred twenty-five thousand, four hundred sixty-two".