21005160466 has 8 divisors (see below), whose sum is σ = 31536623664. Its totient is φ = 10492952580.

The previous prime is 21005160439. The next prime is 21005160469. The reversal of 21005160466 is 66406150012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21005160469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4811100 + ... + 4815463.

It is an arithmetic number, because the mean of its divisors is an integer number (3942077958).

Almost surely, 2^21005160466 is an apocalyptic number.

21005160466 is a deficient number, since it is larger than the sum of its proper divisors (10531463198).

21005160466 is a wasteful number, since it uses less digits than its factorization.

21005160466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9627656.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21005160466 in words is "twenty-one billion, five million, one hundred sixty thousand, four hundred sixty-six".