20012055140 has 96 divisors (see below), whose sum is σ = 55152921600. Its totient is φ = 5909224320.

The previous prime is 20012055137. The next prime is 20012055163. The reversal of 20012055140 is 4155021002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312710 + ... + 371229.

It is an arithmetic number, because the mean of its divisors is an integer number (574509600).

Almost surely, 2^20012055140 is an apocalyptic number.

20012055140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012055140 is an abundant number, since it is smaller than the sum of its proper divisors (35140866460).

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

20012055140 is a wasteful number, since it uses less digits than its factorization.

20012055140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683985 (or 683983 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 20012055140 its reverse (4155021002), we get a palindrome (24167076142).

The spelling of 20012055140 in words is "twenty billion, twelve million, fifty-five thousand, one hundred forty".