20743901 has 2 divisors, whose sum is σ = 20743902. Its totient is φ = 20743900.

The previous prime is 20743897. The next prime is 20743949. The reversal of 20743901 is 10934702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15007876 + 5736025 = 3874^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 20743901 - 2² = 20743897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20742901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10371950 + 10371951.

It is an arithmetic number, because the mean of its divisors is an integer number (10371951).

Almost surely, 2^20743901 is an apocalyptic number.

It is an amenable number.

20743901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20743901 is an equidigital number, since it uses as much as digits as its factorization.

20743901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20743901 is about 4554.5472881506. The cubic root of 20743901 is about 274.7663072512.

The spelling of 20743901 in words is "twenty million, seven hundred forty-three thousand, nine hundred one".