20452628784 has 80 divisors (see below), whose sum is σ = 60721470720. Its totient is φ = 5810945280.

The previous prime is 20452628783. The next prime is 20452628809. The reversal of 20452628784 is 48782625402.

It is a super-2 number, since 2×20452628784² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20452628783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109887 + ... + 230174.

It is an arithmetic number, because the mean of its divisors is an integer number (759018384).

Almost surely, 2^20452628784 is an apocalyptic number.

20452628784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20452628784 is an abundant number, since it is smaller than the sum of its proper divisors (40268841936).

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

20452628784 is a wasteful number, since it uses less digits than its factorization.

20452628784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340258 (or 340252 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 20452628784 in words is "twenty billion, four hundred fifty-two million, six hundred twenty-eight thousand, seven hundred eighty-four".