25700021983 has 8 divisors (see below), whose sum is σ = 27235910880. Its totient is φ = 24166813440.

The previous prime is 25700021959. The next prime is 25700022059. The reversal of 25700021983 is 38912000752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25700021983 - 2⁵ = 25700021951 is a prime.

It is a super-2 number, since 2×25700021983² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25700021903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650323 + ... + 688708.

It is an arithmetic number, because the mean of its divisors is an integer number (3404488860).

Almost surely, 2^25700021983 is an apocalyptic number.

25700021983 is a deficient number, since it is larger than the sum of its proper divisors (1535888897).

25700021983 is a wasteful number, since it uses less digits than its factorization.

25700021983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340177.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 25700021983 in words is "twenty-five billion, seven hundred million, twenty-one thousand, nine hundred eighty-three".