20401132144 has 20 divisors (see below), whose sum is σ = 39551390424. Its totient is φ = 10194321728.

The previous prime is 20401132133. The next prime is 20401132151. The reversal of 20401132144 is 44123110402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363262 + ... + 415645.

Almost surely, 2^20401132144 is an apocalyptic number.

It is an amenable number.

20401132144 is a deficient number, since it is larger than the sum of its proper divisors (19150258280).

20401132144 is a wasteful number, since it uses less digits than its factorization.

20401132144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780552 (or 780546 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20401132144 its reverse (44123110402), we get a palindrome (64524242546).

The spelling of 20401132144 in words is "twenty billion, four hundred one million, one hundred thirty-two thousand, one hundred forty-four".