20761537504 has 24 divisors (see below), whose sum is σ = 43278647328. Its totient is φ = 9770135040.

The previous prime is 20761537501. The next prime is 20761537507. The reversal of 20761537504 is 40573516702.

It is an interprime number because it is at equal distance from previous prime (20761537501) and next prime (20761537507).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761537501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19081752 + ... + 19082839.

It is an arithmetic number, because the mean of its divisors is an integer number (1803276972).

Almost surely, 2^20761537504 is an apocalyptic number.

It is an amenable number.

20761537504 is an abundant number, since it is smaller than the sum of its proper divisors (22517109824).

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

20761537504 is a wasteful number, since it uses less digits than its factorization.

20761537504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38164618 (or 38164610 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 20761537504 in words is "twenty billion, seven hundred sixty-one million, five hundred thirty-seven thousand, five hundred four".