20473606899729 has 45 divisors (see below), whose sum is σ = 30721702078969. Its totient is φ = 13587905331000.

The previous prime is 20473606899709. The next prime is 20473606899769. The reversal of 20473606899729 is 92799860637402.

The square root of 20473606899729 is 4524777.

It is a perfect power (a square), and thus also a powerful number.

20473606899729 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 3 + 606 + 8 + 9 + 9 + 7 + 2 + 9 = 666.

It is not a de Polignac number, because 20473606899729 - 2¹⁵ = 20473606866961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20473606899709) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 10221470242 + ... + 10221472244.

Almost surely, 2^{20473606899729} is an apocalyptic number.

20473606899729 is the 4524777-th square number.

20473606899729 is the 2262389-th centered octagonal number.

It is an amenable number.

20473606899729 is a deficient number, since it is larger than the sum of its proper divisors (10248095179240).

20473606899729 is an frugal number, since it uses more digits than its factorization.

20473606899729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520 (or 2257 counting only the distinct ones).

The product of its (nonzero) digits is 493807104, while the sum is 72.

The spelling of 20473606899729 in words is "twenty trillion, four hundred seventy-three billion, six hundred six million, eight hundred ninety-nine thousand, seven hundred twenty-nine".