20057025439 has 4 divisors (see below), whose sum is σ = 21880391400. Its totient is φ = 18233659480.

The previous prime is 20057025431. The next prime is 20057025467. The reversal of 20057025439 is 93452075002.

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

It is a cyclic number.

It is not a de Polignac number, because 20057025439 - 2³ = 20057025431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20057025398 and 20057025407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20057025431) 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, 911682964 + ... + 911682985.

It is an arithmetic number, because the mean of its divisors is an integer number (5470097850).

Almost surely, 2^20057025439 is an apocalyptic number.

20057025439 is a deficient number, since it is larger than the sum of its proper divisors (1823365961).

20057025439 is a wasteful number, since it uses less digits than its factorization.

20057025439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823365960.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 20057025439 in words is "twenty billion, fifty-seven million, twenty-five thousand, four hundred thirty-nine".