20145754544 has 10 divisors (see below), whose sum is σ = 39032399460. Its totient is φ = 10072877264.

The previous prime is 20145754471. The next prime is 20145754567. The reversal of 20145754544 is 44545754102.

It is a happy number.

It is a super-2 number, since 2×20145754544² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629554814 + ... + 629554845.

It is an arithmetic number, because the mean of its divisors is an integer number (3903239946).

Almost surely, 2^20145754544 is an apocalyptic number.

It is an amenable number.

20145754544 is a deficient number, since it is larger than the sum of its proper divisors (18886644916).

20145754544 is a wasteful number, since it uses less digits than its factorization.

20145754544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259109667 (or 1259109661 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 41.

The spelling of 20145754544 in words is "twenty billion, one hundred forty-five million, seven hundred fifty-four thousand, five hundred forty-four".