20758178286 has 48 divisors (see below), whose sum is σ = 47122783344. Its totient is φ = 6848043264.

The previous prime is 20758178269. The next prime is 20758178291. The reversal of 20758178286 is 68287185702.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173025 + ... + 267308.

It is an arithmetic number, because the mean of its divisors is an integer number (981724653).

Almost surely, 2^20758178286 is an apocalyptic number.

20758178286 is an abundant number, since it is smaller than the sum of its proper divisors (26364605058).

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

20758178286 is an equidigital number, since it uses as much as digits as its factorization.

20758178286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440447 (or 440435 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 20758178286 in words is "twenty billion, seven hundred fifty-eight million, one hundred seventy-eight thousand, two hundred eighty-six".