20201655520 has 48 divisors (see below), whose sum is σ = 48301459920. Its totient is φ = 7983299584.

The previous prime is 20201655449. The next prime is 20201655547. The reversal of 20201655520 is 2555610202.

It is a super-3 number, since 3×20201655520³ (a number of 32 digits) contains 333 as substring.

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, 747325 + ... + 773884.

It is an arithmetic number, because the mean of its divisors is an integer number (1006280415).

Almost surely, 2^20201655520 is an apocalyptic number.

20201655520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201655520 is an abundant number, since it is smaller than the sum of its proper divisors (28099804400).

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

20201655520 is a wasteful number, since it uses less digits than its factorization.

20201655520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521307 (or 1521299 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20201655520 in words is "twenty billion, two hundred one million, six hundred fifty-five thousand, five hundred twenty".