20542682836 has 24 divisors (see below), whose sum is σ = 40992414120. Its totient is φ = 8923517952.

The previous prime is 20542682753. The next prime is 20542682861. The reversal of 20542682836 is 63828624502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8969226436 + 11573456400 = 94706^2 + 107580^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 11618281 + ... + 11620048.

It is an arithmetic number, because the mean of its divisors is an integer number (1708017255).

Almost surely, 2^20542682836 is an apocalyptic number.

20542682836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20542682836 is a deficient number, since it is larger than the sum of its proper divisors (20449731284).

20542682836 is a wasteful number, since it uses less digits than its factorization.

20542682836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23238363 (or 23238361 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 20542682836 in words is "twenty billion, five hundred forty-two million, six hundred eighty-two thousand, eight hundred thirty-six".