20406769356 has 24 divisors (see below), whose sum is σ = 47674675440. Its totient is φ = 6793844992.

The previous prime is 20406769351. The next prime is 20406769379. The reversal of 20406769356 is 65396760402.

It is not an unprimeable number, because it can be changed into a prime (20406769351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041321 + ... + 1060736.

It is an arithmetic number, because the mean of its divisors is an integer number (1986444810).

Almost surely, 2^20406769356 is an apocalyptic number.

It is an amenable number.

20406769356 is an abundant number, since it is smaller than the sum of its proper divisors (27267906084).

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

20406769356 is a wasteful number, since it uses less digits than its factorization.

20406769356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102873 (or 2102871 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 48.

The spelling of 20406769356 in words is "twenty billion, four hundred six million, seven hundred sixty-nine thousand, three hundred fifty-six".