20902354966 has 16 divisors (see below), whose sum is σ = 33110913024. Its totient is φ = 9876333544.

The previous prime is 20902354961. The next prime is 20902355003. The reversal of 20902354966 is 66945320902.

It is a super-2 number, since 2×20902354966² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902354961) 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, 2733526 + ... + 2741161.

It is an arithmetic number, because the mean of its divisors is an integer number (2069432064).

Almost surely, 2^20902354966 is an apocalyptic number.

20902354966 is a deficient number, since it is larger than the sum of its proper divisors (12208558058).

20902354966 is a wasteful number, since it uses less digits than its factorization.

20902354966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474795.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 20902354966 in words is "twenty billion, nine hundred two million, three hundred fifty-four thousand, nine hundred sixty-six".