20451031045 has 16 divisors (see below), whose sum is σ = 25876080000. Its totient is φ = 15473809728.

The previous prime is 20451031037. The next prime is 20451031109. The reversal of 20451031045 is 54013015402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20451031045 - 2³ = 20451031037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122790 + ... + 236599.

It is an arithmetic number, because the mean of its divisors is an integer number (1617255000).

Almost surely, 2^20451031045 is an apocalyptic number.

It is an amenable number.

20451031045 is a deficient number, since it is larger than the sum of its proper divisors (5425048955).

20451031045 is a wasteful number, since it uses less digits than its factorization.

20451031045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360012.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20451031045 its reverse (54013015402), we get a palindrome (74464046447).

The spelling of 20451031045 in words is "twenty billion, four hundred fifty-one million, thirty-one thousand, forty-five".