20933869 has 8 divisors (see below), whose sum is σ = 22872960. Its totient is φ = 19000800.

The previous prime is 20933867. The next prime is 20933873. The reversal of 20933869 is 96833902.

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 20933869 - 2¹ = 20933867 is a prime.

It is a super-2 number, since 2×20933869² = 876453742618322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933863) 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, 8977 + ... + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (2859120).

Almost surely, 2^20933869 is an apocalyptic number.

It is an amenable number.

20933869 is a deficient number, since it is larger than the sum of its proper divisors (1939091).

20933869 is a wasteful number, since it uses less digits than its factorization.

20933869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20933869 is about 4575.3545217830. The cubic root of 20933869 is about 275.6025092756.

The spelling of 20933869 in words is "twenty million, nine hundred thirty-three thousand, eight hundred sixty-nine".