20878144375 has 40 divisors (see below), whose sum is σ = 28513672704. Its totient is φ = 15156060000.

The previous prime is 20878144247. The next prime is 20878144387. The reversal of 20878144375 is 57344187802.

It is not a de Polignac number, because 20878144375 - 2⁷ = 20878144247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4170624 + ... + 4175626.

Almost surely, 2^20878144375 is an apocalyptic number.

20878144375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20878144375 is a deficient number, since it is larger than the sum of its proper divisors (7635528329).

20878144375 is an equidigital number, since it uses as much as digits as its factorization.

20878144375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5641 (or 5626 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 20878144375 in words is "twenty billion, eight hundred seventy-eight million, one hundred forty-four thousand, three hundred seventy-five".