21014165854 has 16 divisors (see below), whose sum is σ = 34429990896. Its totient is φ = 9539900800.

The previous prime is 21014165839. The next prime is 21014165897. The reversal of 21014165854 is 45856141012.

It is an alternating number because its digits alternate between even and odd.

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, 581707 + ... + 616774.

It is an arithmetic number, because the mean of its divisors is an integer number (2151874431).

Almost surely, 2^21014165854 is an apocalyptic number.

21014165854 is a deficient number, since it is larger than the sum of its proper divisors (13415825042).

21014165854 is a wasteful number, since it uses less digits than its factorization.

21014165854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199291.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 21014165854 in words is "twenty-one billion, fourteen million, one hundred sixty-five thousand, eight hundred fifty-four".