20012045500100 has 36 divisors (see below), whose sum is σ = 43473807581568. Its totient is φ = 7996031316000.

The previous prime is 20012045500081. The next prime is 20012045500127. The reversal of 20012045500100 is 100554021002.

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 11 ways as a sum of consecutive naturals, for example, 109744496 + ... + 109926695.

Almost surely, 2^{20012045500100} is an apocalyptic number.

20012045500100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012045500100 is an abundant number, since it is smaller than the sum of its proper divisors (23461762081468).

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

20012045500100 is a wasteful number, since it uses less digits than its factorization.

20012045500100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219672116 (or 219672109 counting only the distinct ones).

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

Adding to 20012045500100 its reverse (100554021002), we get a palindrome (20112599521102).

The spelling of 20012045500100 in words is "twenty trillion, twelve billion, forty-five million, five hundred thousand, one hundred".