20145041520 has 40 divisors (see below), whose sum is σ = 62449629456. Its totient is φ = 5372011008.

The previous prime is 20145041489. The next prime is 20145041617. The reversal of 20145041520 is 2514054102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41968597 + ... + 41969076.

Almost surely, 2^20145041520 is an apocalyptic number.

20145041520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20145041520 is an abundant number, since it is smaller than the sum of its proper divisors (42304587936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20145041520 is a wasteful number, since it uses less digits than its factorization.

20145041520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83937689 (or 83937683 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 20145041520 its reverse (2514054102), we get a palindrome (22659095622).

The spelling of 20145041520 in words is "twenty billion, one hundred forty-five million, forty-one thousand, five hundred twenty".