20745874 has 8 divisors (see below), whose sum is σ = 31512960. Its totient is φ = 10241556.

The previous prime is 20745871. The next prime is 20745883. The reversal of 20745874 is 47854702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20745871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65494 + ... + 65809.

It is an arithmetic number, because the mean of its divisors is an integer number (3939120).

Almost surely, 2^20745874 is an apocalyptic number.

20745874 is a deficient number, since it is larger than the sum of its proper divisors (10767086).

20745874 is a wasteful number, since it uses less digits than its factorization.

20745874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131384.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 20745874 is about 4554.7638797198. The cubic root of 20745874 is about 274.7750181929.

The spelling of 20745874 in words is "twenty million, seven hundred forty-five thousand, eight hundred seventy-four".