20667868052 has 24 divisors (see below), whose sum is σ = 38954989416. Its totient is φ = 9538034688.

The previous prime is 20667868033. The next prime is 20667868061. The reversal of 20667868052 is 25086876602.

It can be written as a sum of positive squares in 4 ways, for example, as 34269316 + 20633598736 = 5854^2 + 143644^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 814988 + ... + 839964.

It is an arithmetic number, because the mean of its divisors is an integer number (1623124559).

Almost surely, 2^20667868052 is an apocalyptic number.

It is an amenable number.

20667868052 is a deficient number, since it is larger than the sum of its proper divisors (18287121364).

20667868052 is a wasteful number, since it uses less digits than its factorization.

20667868052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40907 (or 40905 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 20667868052 in words is "twenty billion, six hundred sixty-seven million, eight hundred sixty-eight thousand, fifty-two".