20425860 has 288 divisors, whose sum is σ = 80720640. Its totient is φ = 4064256.

The previous prime is 20425849. The next prime is 20425879. The reversal of 20425860 is 6852402.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 474999 + ... + 475041.

It is an arithmetic number, because the mean of its divisors is an integer number (280280).

Almost surely, 2^20425860 is an apocalyptic number.

20425860 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 20425860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40360320).

20425860 is an abundant number, since it is smaller than the sum of its proper divisors (60294780).

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

20425860 is a wasteful number, since it uses less digits than its factorization.

20425860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20425860 is about 4519.4977597074. The cubic root of 20425860 is about 273.3548499157.

The spelling of 20425860 in words is "twenty million, four hundred twenty-five thousand, eight hundred sixty".