21570094490 has 48 divisors (see below), whose sum is σ = 45178773192. Its totient is φ = 7393228416.

The previous prime is 21570094457. The next prime is 21570094501. The reversal of 21570094490 is 9449007512.

It can be written as a sum of positive squares in 4 ways, for example, as 21532921081 + 37173409 = 146741^2 + 6097^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3072224 + ... + 3079236.

Almost surely, 2^21570094490 is an apocalyptic number.

21570094490 is an abundant number, since it is smaller than the sum of its proper divisors (23608678702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21570094490 is a wasteful number, since it uses less digits than its factorization.

21570094490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13311 (or 13304 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 21570094490 in words is "twenty-one billion, five hundred seventy million, ninety-four thousand, four hundred ninety".