20617430072 has 32 divisors (see below), whose sum is σ = 39291732480. Its totient is φ = 10140962400.

The previous prime is 20617430039. The next prime is 20617430087. The reversal of 20617430072 is 27003471602.

It is a congruent number.

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, 41573 + ... + 207275.

It is an arithmetic number, because the mean of its divisors is an integer number (1227866640).

Almost surely, 2^20617430072 is an apocalyptic number.

It is an amenable number.

20617430072 is a deficient number, since it is larger than the sum of its proper divisors (18674302408).

20617430072 is a wasteful number, since it uses less digits than its factorization.

20617430072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165963 (or 165959 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 20617430072 in words is "twenty billion, six hundred seventeen million, four hundred thirty thousand, seventy-two".