20175859420 has 48 divisors (see below), whose sum is σ = 44941726368. Its totient is φ = 7582054400.

The previous prime is 20175859411. The next prime is 20175859427. The reversal of 20175859420 is 2495857102.

It is a super-3 number, since 3×20175859420³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20175859427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138720 + ... + 244120.

It is an arithmetic number, because the mean of its divisors is an integer number (936285966).

Almost surely, 2^20175859420 is an apocalyptic number.

20175859420 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 20175859420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22470863184).

20175859420 is an abundant number, since it is smaller than the sum of its proper divisors (24765866948).

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

20175859420 is a wasteful number, since it uses less digits than its factorization.

20175859420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105990 (or 105988 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The spelling of 20175859420 in words is "twenty billion, one hundred seventy-five million, eight hundred fifty-nine thousand, four hundred twenty".