20444043140 has 24 divisors (see below), whose sum is σ = 43189578432. Its totient is φ = 8128648160.

The previous prime is 20444043119. The next prime is 20444043167. The reversal of 20444043140 is 4134044402.

It is a happy 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, 3057146 + ... + 3063825.

It is an arithmetic number, because the mean of its divisors is an integer number (1799565768).

Almost surely, 2^20444043140 is an apocalyptic number.

20444043140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444043140 is an abundant number, since it is smaller than the sum of its proper divisors (22745535292).

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

20444043140 is a wasteful number, since it uses less digits than its factorization.

20444043140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121147 (or 6121145 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20444043140 its reverse (4134044402), we get a palindrome (24578087542).

The spelling of 20444043140 in words is "twenty billion, four hundred forty-four million, forty-three thousand, one hundred forty".