20961933 has 8 divisors (see below), whose sum is σ = 28423200. Its totient is φ = 13737648.

The previous prime is 20961929. The next prime is 20961937. The reversal of 20961933 is 33916902.

It is an interprime number because it is at equal distance from previous prime (20961929) and next prime (20961937).

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

It is not a de Polignac number, because 20961933 - 2² = 20961929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20961894 and 20961903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20961937) 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, 59038 + ... + 59391.

It is an arithmetic number, because the mean of its divisors is an integer number (3552900).

Almost surely, 2^20961933 is an apocalyptic number.

It is an amenable number.

20961933 is a deficient number, since it is larger than the sum of its proper divisors (7461267).

20961933 is a wasteful number, since it uses less digits than its factorization.

20961933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118491.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 20961933 is about 4578.4203607795. The cubic root of 20961933 is about 275.7256120983.

The spelling of 20961933 in words is "twenty million, nine hundred sixty-one thousand, nine hundred thirty-three".