20260170840 has 128 divisors (see below), whose sum is σ = 74806824960. Its totient is φ = 4274671104.

The previous prime is 20260170817. The next prime is 20260170899. The reversal of 20260170840 is 4807106202.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20260170798 and 20260170807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 916744 + ... + 938583.

It is an arithmetic number, because the mean of its divisors is an integer number (584428320).

Almost surely, 2^20260170840 is an apocalyptic number.

20260170840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20260170840 is an abundant number, since it is smaller than the sum of its proper divisors (54546654120).

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

20260170840 is a wasteful number, since it uses less digits than its factorization.

20260170840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855361 (or 1855357 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 20260170840 in words is "twenty billion, two hundred sixty million, one hundred seventy thousand, eight hundred forty".