20616159920 has 40 divisors (see below), whose sum is σ = 47971992096. Its totient is φ = 8239682048.

The previous prime is 20616159911. The next prime is 20616159937. The reversal of 20616159920 is 2995161602.

It is a tau number, because it is divible by the number of its divisors (40).

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, 7517 + ... + 203196.

Almost surely, 2^20616159920 is an apocalyptic number.

20616159920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20616159920 is an abundant number, since it is smaller than the sum of its proper divisors (27355832176).

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

20616159920 is a wasteful number, since it uses less digits than its factorization.

20616159920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211949 (or 211943 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 20616159920 in words is "twenty billion, six hundred sixteen million, one hundred fifty-nine thousand, nine hundred twenty".