20902359 has 8 divisors (see below), whose sum is σ = 28830960. Its totient is φ = 13454336.

The previous prime is 20902313. The next prime is 20902381. The reversal of 20902359 is 95320902.

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 20902359 - 2⁸ = 20902103 is a prime.

It is a super-2 number, since 2×20902359² = 873817223529762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120042 + ... + 120215.

It is an arithmetic number, because the mean of its divisors is an integer number (3603870).

Almost surely, 2^20902359 is an apocalyptic number.

20902359 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20902359 is a deficient number, since it is larger than the sum of its proper divisors (7928601).

20902359 is a wasteful number, since it uses less digits than its factorization.

20902359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240289.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 20902359 is about 4571.9097760126. The cubic root of 20902359 is about 275.4641593775.

The spelling of 20902359 in words is "twenty million, nine hundred two thousand, three hundred fifty-nine".