20451441544 has 16 divisors (see below), whose sum is σ = 38368760220. Its totient is φ = 10219772160.

The previous prime is 20451441539. The next prime is 20451441587. The reversal of 20451441544 is 44514415402.

It can be written as a sum of positive squares in 2 ways, for example, as 19535652900 + 915788644 = 139770^2 + 30262^2 .

It is a super-2 number, since 2×20451441544² (a number of 21 digits) contains 22 as substring.

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, 728949 + ... + 756484.

Almost surely, 2^20451441544 is an apocalyptic number.

It is an amenable number.

20451441544 is a deficient number, since it is larger than the sum of its proper divisors (17917318676).

20451441544 is a wasteful number, since it uses less digits than its factorization.

20451441544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487160 (or 1487156 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 20451441544 its reverse (44514415402), we get a palindrome (64965856946).

The spelling of 20451441544 in words is "twenty billion, four hundred fifty-one million, four hundred forty-one thousand, five hundred forty-four".