20297375 has 16 divisors (see below), whose sum is σ = 28951104. Its totient is φ = 13917600.

The previous prime is 20297363. The next prime is 20297383. The reversal of 20297375 is 57379202.

It is not a de Polignac number, because 20297375 - 2¹⁶ = 20231839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10724 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (1809444).

Almost surely, 2^20297375 is an apocalyptic number.

20297375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20297375 is a deficient number, since it is larger than the sum of its proper divisors (8653729).

20297375 is an equidigital number, since it uses as much as digits as its factorization.

20297375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23219 (or 23209 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20297375 is about 4505.2608137598. The cubic root of 20297375 is about 272.7804816217.

The spelling of 20297375 in words is "twenty million, two hundred ninety-seven thousand, three hundred seventy-five".