20412606780 has 36 divisors (see below), whose sum is σ = 61918241112. Its totient is φ = 5443361760.

The previous prime is 20412606769. The next prime is 20412606827. The reversal of 20412606780 is 8760621402.

20412606780 is a `hidden beast` number, since 2 + 0 + 41 + 2 + 606 + 7 + 8 + 0 = 666.

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 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 11 ways as a sum of consecutive naturals, for example, 56701506 + ... + 56701865.

It is an arithmetic number, because the mean of its divisors is an integer number (1719951142).

Almost surely, 2^20412606780 is an apocalyptic number.

20412606780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20412606780 is an abundant number, since it is smaller than the sum of its proper divisors (41505634332).

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

20412606780 is a wasteful number, since it uses less digits than its factorization.

20412606780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113403386 (or 113403381 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 20412606780 in words is "twenty billion, four hundred twelve million, six hundred six thousand, seven hundred eighty".