20100012440 has 32 divisors (see below), whose sum is σ = 45454614480. Its totient is φ = 7999189632.

The previous prime is 20100012421. The next prime is 20100012451. The reversal of 20100012440 is 4421000102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267502 + ... + 1283261.

Almost surely, 2^20100012440 is an apocalyptic number.

20100012440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100012440 is an abundant number, since it is smaller than the sum of its proper divisors (25354602040).

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

20100012440 is a wasteful number, since it uses less digits than its factorization.

20100012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550971 (or 2550967 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20100012440 its reverse (4421000102), we get a palindrome (24521012542).

The spelling of 20100012440 in words is "twenty billion, one hundred million, twelve thousand, four hundred forty".