20672229 has 16 divisors (see below), whose sum is σ = 28373184. Its totient is φ = 13382400.

The previous prime is 20672227. The next prime is 20672231. The reversal of 20672229 is 92227602.

It is an interprime number because it is at equal distance from previous prime (20672227) and next prime (20672231).

It is not a de Polignac number, because 20672229 - 2¹ = 20672227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20672196 and 20672205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20672227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14509 + ... + 15869.

It is an arithmetic number, because the mean of its divisors is an integer number (1773324).

Almost surely, 2^20672229 is an apocalyptic number.

It is an amenable number.

20672229 is a deficient number, since it is larger than the sum of its proper divisors (7700955).

20672229 is a wasteful number, since it uses less digits than its factorization.

20672229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20672229 is about 4546.6722996055. The cubic root of 20672229 is about 274.4494948571.

The spelling of 20672229 in words is "twenty million, six hundred seventy-two thousand, two hundred twenty-nine".