26431523220 has 48 divisors (see below), whose sum is σ = 74059937280. Its totient is φ = 7043485056.

The previous prime is 26431523201. The next prime is 26431523263. The reversal of 26431523220 is 2232513462.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66727 + ... + 239406.

It is an arithmetic number, because the mean of its divisors is an integer number (1542915360).

Almost surely, 2^26431523220 is an apocalyptic number.

26431523220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26431523220 is an abundant number, since it is smaller than the sum of its proper divisors (47628414060).

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

26431523220 is a wasteful number, since it uses less digits than its factorization.

26431523220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307584 (or 307582 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 26431523220 in words is "twenty-six billion, four hundred thirty-one million, five hundred twenty-three thousand, two hundred twenty".