20732769 has 12 divisors (see below), whose sum is σ = 30913792. Its totient is φ = 13375800.

The previous prime is 20732759. The next prime is 20732771. The reversal of 20732769 is 96723702.

It is not a de Polignac number, because 20732769 - 2⁵ = 20732737 is a prime.

It is a super-2 number, since 2×20732769² = 859695420814722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20732759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36877 + ... + 37434.

Almost surely, 2^20732769 is an apocalyptic number.

It is an amenable number.

20732769 is a deficient number, since it is larger than the sum of its proper divisors (10181023).

20732769 is a wasteful number, since it uses less digits than its factorization.

20732769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74348 (or 74345 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20732769 is about 4553.3250487968. The cubic root of 20732769 is about 274.7171482906.

The spelling of 20732769 in words is "twenty million, seven hundred thirty-two thousand, seven hundred sixty-nine".