20142402440420 has 72 divisors (see below), whose sum is σ = 46203446281272. Its totient is φ = 7332445048320.

The previous prime is 20142402440387. The next prime is 20142402440437. The reversal of 20142402440420 is 2404420424102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38011741156 + 20104390699264 = 194966^2 + 4483792^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6373409 + ... + 8994728.

Almost surely, 2^{20142402440420} is an apocalyptic number.

20142402440420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20142402440420 is an abundant number, since it is smaller than the sum of its proper divisors (26061043840852).

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

20142402440420 is a wasteful number, since it uses less digits than its factorization.

20142402440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15368301 (or 15368228 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 20142402440420 its reverse (2404420424102), we get a palindrome (22546822864522).

The spelling of 20142402440420 in words is "twenty trillion, one hundred forty-two billion, four hundred two million, four hundred forty thousand, four hundred twenty".