20969407372 has 24 divisors (see below), whose sum is σ = 38584288512. Its totient is φ = 9952285200.

The previous prime is 20969407351. The next prime is 20969407379. The reversal of 20969407372 is 27370496902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20969407379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857904 + ... + 882007.

It is an arithmetic number, because the mean of its divisors is an integer number (1607678688).

Almost surely, 2^20969407372 is an apocalyptic number.

It is an amenable number.

20969407372 is a deficient number, since it is larger than the sum of its proper divisors (17614881140).

20969407372 is a wasteful number, since it uses less digits than its factorization.

20969407372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740069 (or 1740067 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 20969407372 in words is "twenty billion, nine hundred sixty-nine million, four hundred seven thousand, three hundred seventy-two".