20078975 has 36 divisors (see below), whose sum is σ = 29812824. Its totient is φ = 13366080.

The previous prime is 20078969. The next prime is 20078987. The reversal of 20078975 is 57987002.

It is not a de Polignac number, because 20078975 - 2⁴ = 20078959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45104 + ... + 45546.

It is an arithmetic number, because the mean of its divisors is an integer number (828134).

Almost surely, 2^20078975 is an apocalyptic number.

20078975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20078975 is a deficient number, since it is larger than the sum of its proper divisors (9733849).

20078975 is a wasteful number, since it uses less digits than its factorization.

20078975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 20078975 is about 4480.9569290499. The cubic root of 20078975 is about 271.7985776306.

The spelling of 20078975 in words is "twenty million, seventy-eight thousand, nine hundred seventy-five".