20712475 has 24 divisors (see below), whose sum is σ = 29783808. Its totient is φ = 13994400.

The previous prime is 20712473. The next prime is 20712479. The reversal of 20712475 is 57421702.

It is not a de Polignac number, because 20712475 - 2¹ = 20712473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20712473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11592 + ... + 13258.

It is an arithmetic number, because the mean of its divisors is an integer number (1240992).

Almost surely, 2^20712475 is an apocalyptic number.

20712475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20712475 is a deficient number, since it is larger than the sum of its proper divisors (9071333).

20712475 is a wasteful number, since it uses less digits than its factorization.

20712475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755 (or 1750 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 20712475 is about 4551.0960218391. The cubic root of 20712475 is about 274.6274845987.

The spelling of 20712475 in words is "twenty million, seven hundred twelve thousand, four hundred seventy-five".