20670667849204 has 24 divisors (see below), whose sum is σ = 37000862440808. Its totient is φ = 10101151232640.

The previous prime is 20670667849193. The next prime is 20670667849267. The reversal of 20670667849204 is 40294876607602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3103269792100 + 17567398057104 = 1761610^2 + 4191348^2 .

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 269757399 + ... + 269834014.

Almost surely, 2^{20670667849204} is an apocalyptic number.

It is an amenable number.

20670667849204 is a deficient number, since it is larger than the sum of its proper divisors (16330194591604).

20670667849204 is a wasteful number, since it uses less digits than its factorization.

20670667849204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539591635 (or 539591633 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 20670667849204 in words is "twenty trillion, six hundred seventy billion, six hundred sixty-seven million, eight hundred forty-nine thousand, two hundred four".