20145426320 has 40 divisors (see below), whose sum is σ = 46939364736. Its totient is φ = 8040751488.

The previous prime is 20145426319. The next prime is 20145426337. The reversal of 20145426320 is 2362454102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×20145426320² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234902 + ... + 308981.

Almost surely, 2^20145426320 is an apocalyptic number.

20145426320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20145426320 is an abundant number, since it is smaller than the sum of its proper divisors (26793938416).

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

20145426320 is a wasteful number, since it uses less digits than its factorization.

20145426320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544359 (or 544353 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 20145426320 in words is "twenty billion, one hundred forty-five million, four hundred twenty-six thousand, three hundred twenty".