20347475 has 12 divisors (see below), whose sum is σ = 25769184. Its totient is φ = 15930720.

The previous prime is 20347469. The next prime is 20347511. The reversal of 20347475 is 57474302.

It is not a de Polignac number, because 20347475 - 2¹⁰ = 20346451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7484 + ... + 9833.

It is an arithmetic number, because the mean of its divisors is an integer number (2147432).

Almost surely, 2^20347475 is an apocalyptic number.

20347475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20347475 is a deficient number, since it is larger than the sum of its proper divisors (5421709).

20347475 is a wasteful number, since it uses less digits than its factorization.

20347475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17374 (or 17369 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 20347475 is about 4510.8175533932. The cubic root of 20347475 is about 273.0047318568.

The spelling of 20347475 in words is "twenty million, three hundred forty-seven thousand, four hundred seventy-five".