20860878240 has 384 divisors, whose sum is σ = 78944544000. Its totient is φ = 5126934528.

The previous prime is 20860878223. The next prime is 20860878293. The reversal of 20860878240 is 4287806802.

It is a happy number.

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

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, 3033526 + ... + 3040394.

It is an arithmetic number, because the mean of its divisors is an integer number (205584750).

Almost surely, 2^20860878240 is an apocalyptic number.

20860878240 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 20860878240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39472272000).

20860878240 is an abundant number, since it is smaller than the sum of its proper divisors (58083665760).

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

20860878240 is a wasteful number, since it uses less digits than its factorization.

20860878240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6949 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 20860878240 in words is "twenty billion, eight hundred sixty million, eight hundred seventy-eight thousand, two hundred forty".