20356280544 has 48 divisors (see below), whose sum is σ = 54572168448. Its totient is φ = 6641054592.

The previous prime is 20356280507. The next prime is 20356280587. The reversal of 20356280544 is 44508265302.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 2251282 + ... + 2260305.

It is an arithmetic number, because the mean of its divisors is an integer number (1136920176).

Almost surely, 2^20356280544 is an apocalyptic number.

20356280544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20356280544 is an abundant number, since it is smaller than the sum of its proper divisors (34215887904).

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

20356280544 is a wasteful number, since it uses less digits than its factorization.

20356280544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511647 (or 4511639 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 20356280544 in words is "twenty billion, three hundred fifty-six million, two hundred eighty thousand, five hundred forty-four".