21877340325 has 24 divisors (see below), whose sum is σ = 36248715648. Its totient is φ = 11642695680.

The previous prime is 21877340293. The next prime is 21877340377. The reversal of 21877340325 is 52304377812.

It is a happy number.

It is not a de Polignac number, because 21877340325 - 2⁵ = 21877340293 is a prime.

It is a super-2 number, since 2×21877340325² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280284 + ... + 349733.

It is an arithmetic number, because the mean of its divisors is an integer number (1510363152).

Almost surely, 2^21877340325 is an apocalyptic number.

21877340325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21877340325 is a deficient number, since it is larger than the sum of its proper divisors (14371375323).

21877340325 is a wasteful number, since it uses less digits than its factorization.

21877340325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630493 (or 630488 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 21877340325 in words is "twenty-one billion, eight hundred seventy-seven million, three hundred forty thousand, three hundred twenty-five".