25173983420 has 24 divisors (see below), whose sum is σ = 52910178048. Its totient is φ = 10061057600.

The previous prime is 25173983399. The next prime is 25173983467. The reversal of 25173983420 is 2438937152.

It is a happy number.

It is a super-3 number, since 3×25173983420³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509276 + ... + 556515.

It is an arithmetic number, because the mean of its divisors is an integer number (2204590752).

Almost surely, 2^25173983420 is an apocalyptic number.

25173983420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25173983420 is an abundant number, since it is smaller than the sum of its proper divisors (27736194628).

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

25173983420 is a wasteful number, since it uses less digits than its factorization.

25173983420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066981 (or 1066979 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 25173983420 in words is "twenty-five billion, one hundred seventy-three million, nine hundred eighty-three thousand, four hundred twenty".