20453431604 has 6 divisors (see below), whose sum is σ = 35793505314. Its totient is φ = 10226715800.

The previous prime is 20453431601. The next prime is 20453431637. The reversal of 20453431604 is 40613435402.

It can be written as a sum of positive squares in only one way, i.e., 19866338704 + 587092900 = 140948^2 + 24230^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453431601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556678947 + ... + 2556678954.

It is an arithmetic number, because the mean of its divisors is an integer number (5965584219).

Almost surely, 2^20453431604 is an apocalyptic number.

It is an amenable number.

20453431604 is a deficient number, since it is larger than the sum of its proper divisors (15340073710).

20453431604 is a wasteful number, since it uses less digits than its factorization.

20453431604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113357905 (or 5113357903 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 20453431604 in words is "twenty billion, four hundred fifty-three million, four hundred thirty-one thousand, six hundred four".