20742675 has 24 divisors (see below), whose sum is σ = 34496304. Its totient is φ = 10997760.

The previous prime is 20742653. The next prime is 20742677. The reversal of 20742675 is 57624702.

It is not a de Polignac number, because 20742675 - 2⁵ = 20742643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20742677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13759 + ... + 15191.

It is an arithmetic number, because the mean of its divisors is an integer number (1437346).

Almost surely, 2^20742675 is an apocalyptic number.

20742675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20742675 is a deficient number, since it is larger than the sum of its proper divisors (13753629).

20742675 is a wasteful number, since it uses less digits than its factorization.

20742675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 20742675 is about 4554.4126953977. The cubic root of 20742675 is about 274.7608940918.

The spelling of 20742675 in words is "twenty million, seven hundred forty-two thousand, six hundred seventy-five".