44747213220 has 36 divisors (see below), whose sum is σ = 135733213980. Its totient is φ = 11932590144.

The previous prime is 44747213197. The next prime is 44747213243. The reversal of 44747213220 is 2231274744.

It is an interprime number because it is at equal distance from previous prime (44747213197) and next prime (44747213243).

It can be written as a sum of positive squares in 2 ways, for example, as 28907480484 + 15839732736 = 170022^2 + 125856^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×44747213220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124297635 + ... + 124297994.

It is an arithmetic number, because the mean of its divisors is an integer number (3770367055).

Almost surely, 2^44747213220 is an apocalyptic number.

It is an amenable number.

44747213220 is an abundant number, since it is smaller than the sum of its proper divisors (90986000760).

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

44747213220 is a wasteful number, since it uses less digits than its factorization.

44747213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248595644 (or 248595639 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

Adding to 44747213220 its reverse (2231274744), we get a palindrome (46978487964).

The spelling of 44747213220 in words is "forty-four billion, seven hundred forty-seven million, two hundred thirteen thousand, two hundred twenty".