20402200144 has 10 divisors (see below), whose sum is σ = 39529262810. Its totient is φ = 10201100064.

The previous prime is 20402200109. The next prime is 20402200151. The reversal of 20402200144 is 44100220402.

It can be written as a sum of positive squares in only one way, i.e., 17979591744 + 2422608400 = 134088^2 + 49220^2 .

It is a super-3 number, since 3×20402200144³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637568739 + ... + 637568770.

It is an arithmetic number, because the mean of its divisors is an integer number (3952926281).

Almost surely, 2^20402200144 is an apocalyptic number.

It is an amenable number.

20402200144 is a deficient number, since it is larger than the sum of its proper divisors (19127062666).

20402200144 is a wasteful number, since it uses less digits than its factorization.

20402200144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275137517 (or 1275137511 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20402200144 its reverse (44100220402), we get a palindrome (64502420546).

The spelling of 20402200144 in words is "twenty billion, four hundred two million, two hundred thousand, one hundred forty-four".