20677072820 has 12 divisors (see below), whose sum is σ = 43421852964. Its totient is φ = 8270829120.

The previous prime is 20677072789. The next prime is 20677072831. The reversal of 20677072820 is 2827077602.

It can be written as a sum of positive squares in 2 ways, for example, as 10837226404 + 9839846416 = 104102^2 + 99196^2 .

It is a hoax number, since the sum of its digits (41) 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516926801 + ... + 516926840.

It is an arithmetic number, because the mean of its divisors is an integer number (3618487747).

Almost surely, 2^20677072820 is an apocalyptic number.

20677072820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20677072820 is an abundant number, since it is smaller than the sum of its proper divisors (22744780144).

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

20677072820 is a wasteful number, since it uses less digits than its factorization.

20677072820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033853650 (or 1033853648 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 20677072820 in words is "twenty billion, six hundred seventy-seven million, seventy-two thousand, eight hundred twenty".