20036664540 has 36 divisors (see below), whose sum is σ = 60777882984. Its totient is φ = 5343110496.

The previous prime is 20036664451. The next prime is 20036664563. The reversal of 20036664540 is 4546663002.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20036664495 and 20036664504.

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, 55657222 + ... + 55657581.

Almost surely, 2^20036664540 is an apocalyptic number.

20036664540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20036664540 is an abundant number, since it is smaller than the sum of its proper divisors (40741218444).

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

20036664540 is a wasteful number, since it uses less digits than its factorization.

20036664540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111314818 (or 111314813 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 20036664540 in words is "twenty billion, thirty-six million, six hundred sixty-four thousand, five hundred forty".