20201863920 has 80 divisors (see below), whose sum is σ = 71572323840. Its totient is φ = 4617568512.

The previous prime is 20201863901. The next prime is 20201863931. The reversal of 20201863920 is 2936810202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6010780 + ... + 6014139.

It is an arithmetic number, because the mean of its divisors is an integer number (894654048).

Almost surely, 2^20201863920 is an apocalyptic number.

20201863920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201863920 is an abundant number, since it is smaller than the sum of its proper divisors (51370459920).

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

20201863920 is a wasteful number, since it uses less digits than its factorization.

20201863920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024942 (or 12024936 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20201863920 in words is "twenty billion, two hundred one million, eight hundred sixty-three thousand, nine hundred twenty".