13487400020 has 24 divisors (see below), whose sum is σ = 29237203968. Its totient is φ = 5220928800.

The previous prime is 13487399963. The next prime is 13487400029. The reversal of 13487400020 is 2000478431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487400029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10876316 + ... + 10877555.

It is an arithmetic number, because the mean of its divisors is an integer number (1218216832).

Almost surely, 2^13487400020 is an apocalyptic number.

13487400020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13487400020 is an abundant number, since it is smaller than the sum of its proper divisors (15749803948).

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

13487400020 is a wasteful number, since it uses less digits than its factorization.

13487400020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753911 (or 21753909 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 13487400020 its reverse (2000478431), we get a palindrome (15487878451).

The spelling of 13487400020 in words is "thirteen billion, four hundred eighty-seven million, four hundred thousand, twenty".