20045443031 has 4 divisors (see below), whose sum is σ = 20165475792. Its totient is φ = 19925410272.

The previous prime is 20045443021. The next prime is 20045443051. The reversal of 20045443031 is 13034454002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13034454002 = 2 ⋅6517227001.

It is a cyclic number.

It is not a de Polignac number, because 20045443031 - 2³⁴ = 2865573847 is a prime.

It is a super-2 number, since 2×20045443031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045443021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60016130 + ... + 60016463.

It is an arithmetic number, because the mean of its divisors is an integer number (5041368948).

Almost surely, 2^20045443031 is an apocalyptic number.

20045443031 is a deficient number, since it is larger than the sum of its proper divisors (120032761).

20045443031 is a wasteful number, since it uses less digits than its factorization.

20045443031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120032760.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20045443031 its reverse (13034454002), we get a palindrome (33079897033).

The spelling of 20045443031 in words is "twenty billion, forty-five million, four hundred forty-three thousand, thirty-one".