40451023220 has 24 divisors (see below), whose sum is σ = 88640504064. Its totient is φ = 15476913056.

The previous prime is 40451023213. The next prime is 40451023271. The reversal of 40451023220 is 2232015404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 43968044 + ... + 43968963.

It is an arithmetic number, because the mean of its divisors is an integer number (3693354336).

Almost surely, 2^40451023220 is an apocalyptic number.

It is an amenable number.

40451023220 is an abundant number, since it is smaller than the sum of its proper divisors (48189480844).

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

40451023220 is a wasteful number, since it uses less digits than its factorization.

40451023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87937039 (or 87937037 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 40451023220 its reverse (2232015404), we get a palindrome (42683038624).

The spelling of 40451023220 in words is "forty billion, four hundred fifty-one million, twenty-three thousand, two hundred twenty".