20125057249 has 16 divisors (see below), whose sum is σ = 23485726656. Its totient is φ = 17041766400.

The previous prime is 20125057243. The next prime is 20125057273. The reversal of 20125057249 is 94275052102.

It is a cyclic number.

It is not a de Polignac number, because 20125057249 - 2⁵ = 20125057217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125057243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536607 + ... + 572884.

It is an arithmetic number, because the mean of its divisors is an integer number (1467857916).

Almost surely, 2^20125057249 is an apocalyptic number.

It is an amenable number.

20125057249 is a deficient number, since it is larger than the sum of its proper divisors (3360669407).

20125057249 is a wasteful number, since it uses less digits than its factorization.

20125057249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109616.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 20125057249 in words is "twenty billion, one hundred twenty-five million, fifty-seven thousand, two hundred forty-nine".