20293477 has 2 divisors, whose sum is σ = 20293478. Its totient is φ = 20293476.

The previous prime is 20293459. The next prime is 20293487. The reversal of 20293477 is 77439202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15992001 + 4301476 = 3999^2 + 2074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20293477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20293447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10146738 + 10146739.

It is an arithmetic number, because the mean of its divisors is an integer number (10146739).

Almost surely, 2^20293477 is an apocalyptic number.

It is an amenable number.

20293477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20293477 is an equidigital number, since it uses as much as digits as its factorization.

20293477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 20293477 is about 4504.8281876227. The cubic root of 20293477 is about 272.7630185032.

The spelling of 20293477 in words is "twenty million, two hundred ninety-three thousand, four hundred seventy-seven".