20419560 has 256 divisors, whose sum is σ = 80985600. Its totient is φ = 4478976.

The previous prime is 20419549. The next prime is 20419571. The reversal of 20419560 is 6591402.

It is an interprime number because it is at equal distance from previous prime (20419549) and next prime (20419571).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279684 + ... + 279756.

It is an arithmetic number, because the mean of its divisors is an integer number (316350).

Almost surely, 2^20419560 is an apocalyptic number.

20419560 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 20419560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40492800).

20419560 is an abundant number, since it is smaller than the sum of its proper divisors (60566040).

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

20419560 is a wasteful number, since it uses less digits than its factorization.

20419560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20419560 is about 4518.8007258564. The cubic root of 20419560 is about 273.3267431817.

The spelling of 20419560 in words is "twenty million, four hundred nineteen thousand, five hundred sixty".