20320570156 has 6 divisors (see below), whose sum is σ = 35560997780. Its totient is φ = 10160285076.

The previous prime is 20320570121. The next prime is 20320570181. The reversal of 20320570156 is 65107502302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540071266 + ... + 2540071273.

Almost surely, 2^20320570156 is an apocalyptic number.

It is an amenable number.

20320570156 is a deficient number, since it is larger than the sum of its proper divisors (15240427624).

20320570156 is a wasteful number, since it uses less digits than its factorization.

20320570156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080142543 (or 5080142541 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 20320570156 in words is "twenty billion, three hundred twenty million, five hundred seventy thousand, one hundred fifty-six".