20404402045 has 8 divisors (see below), whose sum is σ = 25549860096. Its totient is φ = 15613803216.

The previous prime is 20404402009. The next prime is 20404402049. The reversal of 20404402045 is 54020440402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404402045 - 2¹³ = 20404393853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404402049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88714677 + ... + 88714906.

It is an arithmetic number, because the mean of its divisors is an integer number (3193732512).

Almost surely, 2^20404402045 is an apocalyptic number.

It is an amenable number.

20404402045 is a deficient number, since it is larger than the sum of its proper divisors (5145458051).

20404402045 is a wasteful number, since it uses less digits than its factorization.

20404402045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177429611.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 20404402045 its reverse (54020440402), we get a palindrome (74424842447).

The spelling of 20404402045 in words is "twenty billion, four hundred four million, four hundred two thousand, forty-five".