21250641460406 has 16 divisors (see below), whose sum is σ = 32977952982000. Its totient is φ = 10258053126048.

The previous prime is 21250641460393. The next prime is 21250641460549. The reversal of 21250641460406 is 60406414605212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14980505 + ... + 16337588.

It is an arithmetic number, because the mean of its divisors is an integer number (2061122061375).

Almost surely, 2^{21250641460406} is an apocalyptic number.

21250641460406 is a deficient number, since it is larger than the sum of its proper divisors (11727311521594).

21250641460406 is a wasteful number, since it uses less digits than its factorization.

21250641460406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31329823.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 21250641460406 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred sixty thousand, four hundred six".