20055407 has 2 divisors, whose sum is σ = 20055408. Its totient is φ = 20055406.

The previous prime is 20055403. The next prime is 20055433. The reversal of 20055407 is 70455002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20055407 - 2² = 20055403 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20055403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027703 + 10027704.

It is an arithmetic number, because the mean of its divisors is an integer number (10027704).

Almost surely, 2^20055407 is an apocalyptic number.

20055407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20055407 is an equidigital number, since it uses as much as digits as its factorization.

20055407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20055407 is about 4478.3263614882. The cubic root of 20055407 is about 271.6921934352.

The spelling of 20055407 in words is "twenty million, fifty-five thousand, four hundred seven".