20772069 has 4 divisors (see below), whose sum is σ = 27696096. Its totient is φ = 13848044.

The previous prime is 20772067. The next prime is 20772107. The reversal of 20772069 is 96027702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20772069 - 2¹ = 20772067 is a prime.

It is a super-2 number, since 2×20772069² = 862957701081522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20772061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3462009 + ... + 3462014.

It is an arithmetic number, because the mean of its divisors is an integer number (6924024).

Almost surely, 2^20772069 is an apocalyptic number.

It is an amenable number.

20772069 is a deficient number, since it is larger than the sum of its proper divisors (6924027).

20772069 is an equidigital number, since it uses as much as digits as its factorization.

20772069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6924026.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20772069 is about 4557.6385332758. The cubic root of 20772069 is about 274.8906187583.

The spelling of 20772069 in words is "twenty million, seven hundred seventy-two thousand, sixty-nine".