20501033660 has 24 divisors (see below), whose sum is σ = 43078222320. Its totient is φ = 8195451264.

The previous prime is 20501033639. The next prime is 20501033671. The reversal of 20501033660 is 6633010502.

It is a super-2 number, since 2×20501033660² (a number of 21 digits) contains 22 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, 276170 + ... + 342449.

It is an arithmetic number, because the mean of its divisors is an integer number (1794925930).

Almost surely, 2^20501033660 is an apocalyptic number.

20501033660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20501033660 is an abundant number, since it is smaller than the sum of its proper divisors (22577188660).

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

20501033660 is a wasteful number, since it uses less digits than its factorization.

20501033660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620285 (or 620283 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The spelling of 20501033660 in words is "twenty billion, five hundred one million, thirty-three thousand, six hundred sixty".