20445143653 has 32 divisors (see below), whose sum is σ = 24712031232. Its totient is φ = 16696627200.

The previous prime is 20445143639. The next prime is 20445143657. The reversal of 20445143653 is 35634154402.

It is not a de Polignac number, because 20445143653 - 2³³ = 11855209061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445143657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399025 + ... + 447337.

It is an arithmetic number, because the mean of its divisors is an integer number (772250976).

Almost surely, 2^20445143653 is an apocalyptic number.

It is an amenable number.

20445143653 is a deficient number, since it is larger than the sum of its proper divisors (4266887579).

20445143653 is a wasteful number, since it uses less digits than its factorization.

20445143653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48445.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 20445143653 in words is "twenty billion, four hundred forty-five million, one hundred forty-three thousand, six hundred fifty-three".