20601975 has 12 divisors (see below), whose sum is σ = 34062056. Its totient is φ = 10987680.

The previous prime is 20601961. The next prime is 20601979. The reversal of 20601975 is 57910602.

It is not a de Polignac number, because 20601975 - 2¹² = 20597879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137272 + ... + 137421.

Almost surely, 2^20601975 is an apocalyptic number.

20601975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20601975 is a deficient number, since it is larger than the sum of its proper divisors (13460081).

20601975 is a wasteful number, since it uses less digits than its factorization.

20601975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274706 (or 274701 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20601975 is about 4538.9398541950. The cubic root of 20601975 is about 274.1382389797.

The spelling of 20601975 in words is "twenty million, six hundred one thousand, nine hundred seventy-five".