20725015258 has 4 divisors (see below), whose sum is σ = 31087522890. Its totient is φ = 10362507628.

The previous prime is 20725015193. The next prime is 20725015277. The reversal of 20725015258 is 85251052702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16369411249 + 4355604009 = 127943^2 + 65997^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5181253813 + ... + 5181253816.

Almost surely, 2^20725015258 is an apocalyptic number.

20725015258 is a deficient number, since it is larger than the sum of its proper divisors (10362507632).

20725015258 is a wasteful number, since it uses less digits than its factorization.

20725015258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362507631.

The product of its (nonzero) digits is 56000, while the sum is 37.

The spelling of 20725015258 in words is "twenty billion, seven hundred twenty-five million, fifteen thousand, two hundred fifty-eight".