20902069 has 8 divisors (see below), whose sum is σ = 21684960. Its totient is φ = 20123376.

The previous prime is 20902043. The next prime is 20902073. The reversal of 20902069 is 96020902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20902069 - 2⁷ = 20901941 is a prime.

It is a super-2 number, since 2×20902069² = 873792976961522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12034 + ... + 13660.

It is an arithmetic number, because the mean of its divisors is an integer number (2710620).

Almost surely, 2^20902069 is an apocalyptic number.

20902069 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20902069 is a deficient number, since it is larger than the sum of its proper divisors (782891).

20902069 is a wasteful number, since it uses less digits than its factorization.

20902069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 20902069 is about 4571.8780604911. The cubic root of 20902069 is about 275.4628854387.

The spelling of 20902069 in words is "twenty million, nine hundred two thousand, sixty-nine".