20458725 has 72 divisors (see below), whose sum is σ = 41559840. Its totient is φ = 8830080.

The previous prime is 20458723. The next prime is 20458727. The reversal of 20458725 is 52785402.

20458725 = T₂₂ + T₂₃ + ... + T₄₉₆.

It is an interprime number because it is at equal distance from previous prime (20458723) and next prime (20458727).

It is not a de Polignac number, because 20458725 - 2¹ = 20458723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20458723) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 69679 + ... + 69971.

It is an arithmetic number, because the mean of its divisors is an integer number (577220).

Almost surely, 2^20458725 is an apocalyptic number.

20458725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20458725 is an abundant number, since it is smaller than the sum of its proper divisors (21101115).

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

20458725 is a wasteful number, since it uses less digits than its factorization.

20458725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 20458725 is about 4523.1322112006. The cubic root of 20458725 is about 273.5013797421.

The spelling of 20458725 in words is "twenty million, four hundred fifty-eight thousand, seven hundred twenty-five".