20072969849 has 2 divisors, whose sum is σ = 20072969850. Its totient is φ = 20072969848.

The previous prime is 20072969809. The next prime is 20072969857. The reversal of 20072969849 is 94896927002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12297257449 + 7775712400 = 110893^2 + 88180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20072969849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20072969794 and 20072969803.

It is not a weakly prime, because it can be changed into another prime (20072969809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036484924 + 10036484925.

It is an arithmetic number, because the mean of its divisors is an integer number (10036484925).

Almost surely, 2^20072969849 is an apocalyptic number.

It is an amenable number.

20072969849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072969849 is an equidigital number, since it uses as much as digits as its factorization.

20072969849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 20072969849 in words is "twenty billion, seventy-two million, nine hundred sixty-nine thousand, eight hundred forty-nine".