21570146954 has 8 divisors (see below), whose sum is σ = 32494084740. Its totient is φ = 10738785376.

The previous prime is 21570146903. The next prime is 21570146993. The reversal of 21570146954 is 45964107512.

It can be written as a sum of positive squares in 2 ways, for example, as 20758181929 + 811965025 = 144077^2 + 28495^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23143469 + ... + 23144400.

Almost surely, 2^21570146954 is an apocalyptic number.

21570146954 is a deficient number, since it is larger than the sum of its proper divisors (10923937786).

21570146954 is a wasteful number, since it uses less digits than its factorization.

21570146954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46288104.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 21570146954 in words is "twenty-one billion, five hundred seventy million, one hundred forty-six thousand, nine hundred fifty-four".