20120855103 has 24 divisors (see below), whose sum is σ = 29432697840. Its totient is φ = 13243695360.

The previous prime is 20120855077. The next prime is 20120855143. The reversal of 20120855103 is 30155802102.

It is a happy number.

20120855103 is a `hidden beast` number, since 20 + 120 + 8 + 5 + 510 + 3 = 666.

It is a Cunningham number, because it is equal to 141848²-1.

It is not a de Polignac number, because 20120855103 - 2⁶ = 20120855039 is a prime.

It is a super-2 number, since 2×20120855103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120855143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1268743 + ... + 1284503.

It is an arithmetic number, because the mean of its divisors is an integer number (1226362410).

Almost surely, 2^20120855103 is an apocalyptic number.

20120855103 is a deficient number, since it is larger than the sum of its proper divisors (9311842737).

20120855103 is a wasteful number, since it uses less digits than its factorization.

20120855103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17559 (or 17556 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 20120855103 in words is "twenty billion, one hundred twenty million, eight hundred fifty-five thousand, one hundred three".