20572391226 has 8 divisors (see below), whose sum is σ = 41144782464. Its totient is φ = 6857463740.

The previous prime is 20572391209. The next prime is 20572391243. The reversal of 20572391226 is 62219327502.

It is an interprime number because it is at equal distance from previous prime (20572391209) and next prime (20572391243).

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

20572391226 is an admirable 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, 1714365930 + ... + 1714365941.

It is an arithmetic number, because the mean of its divisors is an integer number (5143097808).

Almost surely, 2^20572391226 is an apocalyptic number.

20572391226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20572391226 is a wasteful number, since it uses less digits than its factorization.

20572391226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428731876.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 20572391226 in words is "twenty billion, five hundred seventy-two million, three hundred ninety-one thousand, two hundred twenty-six".