20725842 has 8 divisors (see below), whose sum is σ = 41451696. Its totient is φ = 6908612.

The previous prime is 20725813. The next prime is 20725853. The reversal of 20725842 is 24852702.

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

20725842 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1727148 + ... + 1727159.

It is an arithmetic number, because the mean of its divisors is an integer number (5181462).

Almost surely, 2^20725842 is an apocalyptic number.

20725842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20725842 is a wasteful number, since it uses less digits than its factorization.

20725842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454312.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20725842 is about 4552.5643323296. The cubic root of 20725842 is about 274.6865497462.

The spelling of 20725842 in words is "twenty million, seven hundred twenty-five thousand, eight hundred forty-two".