20112051 has 32 divisors (see below), whose sum is σ = 30528000. Its totient is φ = 11731104.

The previous prime is 20112031. The next prime is 20112061. The reversal of 20112051 is 15021102.

Added to its reverse (15021102) it gives a triangular number (35133153 = T₈₃₈₂).

It is not a de Polignac number, because 20112051 - 2¹⁰ = 20111027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693505 + ... + 693533.

It is an arithmetic number, because the mean of its divisors is an integer number (954000).

Almost surely, 2^20112051 is an apocalyptic number.

20112051 is a deficient number, since it is larger than the sum of its proper divisors (10415949).

20112051 is an equidigital number, since it uses as much as digits as its factorization.

20112051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 20112051 is about 4484.6461398866. The cubic root of 20112051 is about 271.9477399237.

Adding to 20112051 its reverse (15021102), we get a palindrome (35133153).

The spelling of 20112051 in words is "twenty million, one hundred twelve thousand, fifty-one".