20541530625 has 160 divisors (see below), whose sum is σ = 43234160640. Its totient is φ = 8424000000.

The previous prime is 20541530579. The next prime is 20541530701. The reversal of 20541530625 is 52603514502.

It is not a de Polignac number, because 20541530625 - 2⁷ = 20541530497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11404725 + ... + 11406525.

It is an arithmetic number, because the mean of its divisors is an integer number (270213504).

Almost surely, 2^20541530625 is an apocalyptic number.

20541530625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20541530625 is an abundant number, since it is smaller than the sum of its proper divisors (22692630015).

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

20541530625 is a wasteful number, since it uses less digits than its factorization.

20541530625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 20541530625 in words is "twenty billion, five hundred forty-one million, five hundred thirty thousand, six hundred twenty-five".