20020115144 has 32 divisors (see below), whose sum is σ = 40009075200. Its totient is φ = 9358828800.

The previous prime is 20020115119. The next prime is 20020115183. The reversal of 20020115144 is 44151102002.

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, 466904 + ... + 507975.

It is an arithmetic number, because the mean of its divisors is an integer number (1250283600).

Almost surely, 2^20020115144 is an apocalyptic number.

It is an amenable number.

20020115144 is a deficient number, since it is larger than the sum of its proper divisors (19988960056).

20020115144 is a wasteful number, since it uses less digits than its factorization.

20020115144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975053 (or 975049 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20020115144 its reverse (44151102002), we get a palindrome (64171217146).

The spelling of 20020115144 in words is "twenty billion, twenty million, one hundred fifteen thousand, one hundred forty-four".