20402044145 has 32 divisors (see below), whose sum is σ = 28367539200. Its totient is φ = 13797501120.

The previous prime is 20402044141. The next prime is 20402044147. The reversal of 20402044145 is 54144020402.

It is not a de Polignac number, because 20402044145 - 2² = 20402044141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20402044141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733706 + ... + 761004.

It is an arithmetic number, because the mean of its divisors is an integer number (886485600).

Almost surely, 2^20402044145 is an apocalyptic number.

It is an amenable number.

20402044145 is a deficient number, since it is larger than the sum of its proper divisors (7965495055).

20402044145 is a wasteful number, since it uses less digits than its factorization.

20402044145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27605.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 20402044145 its reverse (54144020402), we get a palindrome (74546064547).

The spelling of 20402044145 in words is "twenty billion, four hundred two million, forty-four thousand, one hundred forty-five".