20806462990 has 16 divisors (see below), whose sum is σ = 37453288752. Its totient is φ = 8322217344.

The previous prime is 20806462961. The next prime is 20806463011. The reversal of 20806462990 is 9926460802.

It is a self number, because there is not a number n which added to its sum of digits gives 20806462990.

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, 375877 + ... + 427663.

It is an arithmetic number, because the mean of its divisors is an integer number (2340830547).

Almost surely, 2^20806462990 is an apocalyptic number.

20806462990 is a deficient number, since it is larger than the sum of its proper divisors (16646825762).

20806462990 is a wasteful number, since it uses less digits than its factorization.

20806462990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91971.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 20806462990 in words is "twenty billion, eight hundred six million, four hundred sixty-two thousand, nine hundred ninety".