20470505394 has 16 divisors (see below), whose sum is σ = 40947145632. Its totient is φ = 6822479328.

The previous prime is 20470505357. The next prime is 20470505453. The reversal of 20470505394 is 49350507402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211659 + ... + 292814.

It is an arithmetic number, because the mean of its divisors is an integer number (2559196602).

Almost surely, 2^20470505394 is an apocalyptic number.

20470505394 is an abundant number, since it is smaller than the sum of its proper divisors (20476640238).

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

20470505394 is a wasteful number, since it uses less digits than its factorization.

20470505394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511241.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20470505394 in words is "twenty billion, four hundred seventy million, five hundred five thousand, three hundred ninety-four".