25389273420 has 240 divisors, whose sum is σ = 93962846208. Its totient is φ = 5615982720.

The previous prime is 25389273397. The next prime is 25389273421. The reversal of 25389273420 is 2437298352.

25389273420 is a `hidden beast` number, since 2 + 538 + 9 + 2 + 73 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25389273421) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 315429 + ... + 387651.

Almost surely, 2^25389273420 is an apocalyptic number.

25389273420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25389273420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46981423104).

25389273420 is an abundant number, since it is smaller than the sum of its proper divisors (68573572788).

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

25389273420 is a wasteful number, since it uses less digits than its factorization.

25389273420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72282 (or 72271 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 25389273420 in words is "twenty-five billion, three hundred eighty-nine million, two hundred seventy-three thousand, four hundred twenty".