20372206178478 has 96 divisors (see below), whose sum is σ = 51292669139712. Its totient is φ = 5280150712320.

The previous prime is 20372206178459. The next prime is 20372206178497. The reversal of 20372206178478 is 87487160227302.

It is an interprime number because it is at equal distance from previous prime (20372206178459) and next prime (20372206178497).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1918675 + ... + 6665262.

It is an arithmetic number, because the mean of its divisors is an integer number (534298636872).

Almost surely, 2^{20372206178478} is an apocalyptic number.

20372206178478 is an abundant number, since it is smaller than the sum of its proper divisors (30920462961234).

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

20372206178478 is a wasteful number, since it uses less digits than its factorization.

20372206178478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584438 (or 8584427 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 57.

The spelling of 20372206178478 in words is "twenty trillion, three hundred seventy-two billion, two hundred six million, one hundred seventy-eight thousand, four hundred seventy-eight".