20077975 has 6 divisors (see below), whose sum is σ = 24896720. Its totient is φ = 16062360.

The previous prime is 20077973. The next prime is 20077979. The reversal of 20077975 is 57977002.

It is not a de Polignac number, because 20077975 - 2¹ = 20077973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401535 + ... + 401584.

Almost surely, 2^20077975 is an apocalyptic number.

20077975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20077975 is a deficient number, since it is larger than the sum of its proper divisors (4818745).

20077975 is an equidigital number, since it uses as much as digits as its factorization.

20077975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803129 (or 803124 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 20077975 is about 4480.8453443519. The cubic root of 20077975 is about 271.7940653968.

The spelling of 20077975 in words is "twenty million, seventy-seven thousand, nine hundred seventy-five".