20910199662 has 48 divisors (see below), whose sum is σ = 49435729200. Its totient is φ = 6334934400.

The previous prime is 20910199571. The next prime is 20910199663. The reversal of 20910199662 is 26699101902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910199663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1069212 + ... + 1088592.

It is an arithmetic number, because the mean of its divisors is an integer number (1029911025).

Almost surely, 2^20910199662 is an apocalyptic number.

20910199662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20910199662 is an abundant number, since it is smaller than the sum of its proper divisors (28525529538).

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

20910199662 is a wasteful number, since it uses less digits than its factorization.

20910199662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24849 (or 24846 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 20910199662 in words is "twenty billion, nine hundred ten million, one hundred ninety-nine thousand, six hundred sixty-two".