20712230450 has 18 divisors (see below), whose sum is σ = 38526641559. Its totient is φ = 8284485120.

The previous prime is 20712230431. The next prime is 20712230459. The reversal of 20712230450 is 5403221702.

It can be written as a sum of positive squares in 5 ways, for example, as 5009383729 + 15702846721 = 70777^2 + 125311^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101765.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20712230459) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1007474 + ... + 1027826.

Almost surely, 2^20712230450 is an apocalyptic number.

20712230450 is a deficient number, since it is larger than the sum of its proper divisors (17814411109).

20712230450 is an frugal number, since it uses more digits than its factorization.

20712230450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40718 (or 20360 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The spelling of 20712230450 in words is "twenty billion, seven hundred twelve million, two hundred thirty thousand, four hundred fifty".