20078972575 has 12 divisors (see below), whose sum is σ = 24910023960. Its totient is φ = 16055372960.

The previous prime is 20078972569. The next prime is 20078972581. The reversal of 20078972575 is 57527987002.

It is an interprime number because it is at equal distance from previous prime (20078972569) and next prime (20078972581).

It is not a de Polignac number, because 20078972575 - 2¹³ = 20078964383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142369 + ... + 245818.

It is an arithmetic number, because the mean of its divisors is an integer number (2075835330).

Almost surely, 2^20078972575 is an apocalyptic number.

20078972575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20078972575 is a deficient number, since it is larger than the sum of its proper divisors (4831051385).

20078972575 is a wasteful number, since it uses less digits than its factorization.

20078972575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390266 (or 390261 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 20078972575 in words is "twenty billion, seventy-eight million, nine hundred seventy-two thousand, five hundred seventy-five".