20111203031420 has 12 divisors (see below), whose sum is σ = 42233526366024. Its totient is φ = 8044481212560.

The previous prime is 20111203031417. The next prime is 20111203031431. The reversal of 20111203031420 is 2413030211102.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1005560151571 = 20111203031420 / (2 + 0 + 1 + 1 + 1 + 2 + 0 + 3 + 0 + 3 + 1 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20111203031392 and 20111203031401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502780075766 + ... + 502780075805.

It is an arithmetic number, because the mean of its divisors is an integer number (3519460530502).

Almost surely, 2^{20111203031420} is an apocalyptic number.

20111203031420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111203031420 is an abundant number, since it is smaller than the sum of its proper divisors (22122323334604).

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

20111203031420 is a wasteful number, since it uses less digits than its factorization.

20111203031420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005560151580 (or 1005560151578 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20111203031420 its reverse (2413030211102), we get a palindrome (22524233242522).

The spelling of 20111203031420 in words is "twenty trillion, one hundred eleven billion, two hundred three million, thirty-one thousand, four hundred twenty".