21466051610 has 32 divisors (see below), whose sum is σ = 41279595840. Its totient is φ = 8013088512.

The previous prime is 21466051601. The next prime is 21466051637. The reversal of 21466051610 is 1615066412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830399 + ... + 855858.

It is an arithmetic number, because the mean of its divisors is an integer number (1289987370).

Almost surely, 2^21466051610 is an apocalyptic number.

21466051610 is a deficient number, since it is larger than the sum of its proper divisors (19813544230).

21466051610 is a wasteful number, since it uses less digits than its factorization.

21466051610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686350.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21466051610 in words is "twenty-one billion, four hundred sixty-six million, fifty-one thousand, six hundred ten".