20401933 has 2 divisors, whose sum is σ = 20401934. Its totient is φ = 20401932.

The previous prime is 20401919. The next prime is 20401951. The reversal of 20401933 is 33910402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11269449 + 9132484 = 3357^2 + 3022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200966 + 10200967.

It is an arithmetic number, because the mean of its divisors is an integer number (10200967).

Almost surely, 2^20401933 is an apocalyptic number.

It is an amenable number.

20401933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401933 is an equidigital number, since it uses as much as digits as its factorization.

20401933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20401933 is about 4516.8498978824. The cubic root of 20401933 is about 273.2480715957.

The spelling of 20401933 in words is "twenty million, four hundred one thousand, nine hundred thirty-three".