20535500340 has 36 divisors (see below), whose sum is σ = 62291018244. Its totient is φ = 5476133376.

The previous prime is 20535500327. The next prime is 20535500393. The reversal of 20535500340 is 4300553502.

20535500340 is a `hidden beast` number, since 20 + 53 + 550 + 0 + 3 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10642810896 + 9892689444 = 103164^2 + 99462^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57042877 + ... + 57043236.

Almost surely, 2^20535500340 is an apocalyptic number.

20535500340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20535500340 is an abundant number, since it is smaller than the sum of its proper divisors (41755517904).

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

20535500340 is a wasteful number, since it uses less digits than its factorization.

20535500340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114086128 (or 114086123 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The spelling of 20535500340 in words is "twenty billion, five hundred thirty-five million, five hundred thousand, three hundred forty".