20298857040 has 960 divisors, whose sum is σ = 90782760960. Its totient is φ = 4049740800.

The previous prime is 20298857027. The next prime is 20298857041. The reversal of 20298857040 is 4075889202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20298857041) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 159833457 + ... + 159833583.

It is an arithmetic number, because the mean of its divisors is an integer number (94565376).

Almost surely, 2^20298857040 is an apocalyptic number.

20298857040 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 20298857040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45391380480).

20298857040 is an abundant number, since it is smaller than the sum of its proper divisors (70483903920).

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

20298857040 is a wasteful number, since it uses less digits than its factorization.

20298857040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 20298857040 in words is "twenty billion, two hundred ninety-eight million, eight hundred fifty-seven thousand, forty".