20100145544 has 16 divisors (see below), whose sum is σ = 37692073500. Its totient is φ = 10048925952.

The previous prime is 20100145529. The next prime is 20100145553. The reversal of 20100145544 is 44554100102.

It can be written as a sum of positive squares in 2 ways, for example, as 19390562500 + 709583044 = 139250^2 + 26638^2 .

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, 66437 + ... + 211220.

Almost surely, 2^20100145544 is an apocalyptic number.

It is an amenable number.

20100145544 is a deficient number, since it is larger than the sum of its proper divisors (17591927956).

20100145544 is a wasteful number, since it uses less digits than its factorization.

20100145544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286712 (or 286708 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 20100145544 its reverse (44554100102), we get a palindrome (64654245646).

The spelling of 20100145544 in words is "twenty billion, one hundred million, one hundred forty-five thousand, five hundred forty-four".