20662599936 has 72 divisors (see below), whose sum is σ = 59992005024. Its totient is φ = 6261391360.

The previous prime is 20662599931. The next prime is 20662599941. The reversal of 20662599936 is 63999526602.

It is an interprime number because it is at equal distance from previous prime (20662599931) and next prime (20662599941).

It is a super-2 number, since 2×20662599936² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20662599931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214481 + ... + 1231376.

It is an arithmetic number, because the mean of its divisors is an integer number (833222292).

Almost surely, 2^20662599936 is an apocalyptic number.

It is an amenable number.

20662599936 is an abundant number, since it is smaller than the sum of its proper divisors (39329405088).

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

20662599936 is a wasteful number, since it uses less digits than its factorization.

20662599936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445887 (or 2445873 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 57.

The spelling of 20662599936 in words is "twenty billion, six hundred sixty-two million, five hundred ninety-nine thousand, nine hundred thirty-six".