20012975 has 6 divisors (see below), whose sum is σ = 24816120. Its totient is φ = 16010360.

The previous prime is 20012963. The next prime is 20012981. The reversal of 20012975 is 57921002.

It is not a de Polignac number, because 20012975 - 2¹⁰ = 20011951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 400235 + ... + 400284.

It is an arithmetic number, because the mean of its divisors is an integer number (4136020).

Almost surely, 2^20012975 is an apocalyptic number.

20012975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20012975 is a deficient number, since it is larger than the sum of its proper divisors (4803145).

20012975 is an equidigital number, since it uses as much as digits as its factorization.

20012975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800529 (or 800524 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20012975 is about 4473.5863688991. The cubic root of 20012975 is about 271.5004482513.

Adding to 20012975 its reverse (57921002), we get a palindrome (77933977).

It can be divided in two parts, 2001 and 2975, that multiplied together give a triangular number (5952975 = T₃₄₅₀).

The spelling of 20012975 in words is "twenty million, twelve thousand, nine hundred seventy-five".