400020124450 has 12 divisors (see below), whose sum is σ = 744037431570. Its totient is φ = 160008049760.

The previous prime is 400020124433. The next prime is 400020124481. The reversal of 400020124450 is 54421020004.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 365143441441 + 34876683009 = 604271^2 + 186753^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4000201195 + ... + 4000201294.

Almost surely, 2^400020124450 is an apocalyptic number.

400020124450 is a deficient number, since it is larger than the sum of its proper divisors (344017307120).

400020124450 is a wasteful number, since it uses less digits than its factorization.

400020124450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8000402501 (or 8000402496 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 400020124450 its reverse (54421020004), we get a palindrome (454441144454).

The spelling of 400020124450 in words is "four hundred billion, twenty million, one hundred twenty-four thousand, four hundred fifty".