20654407 has 2 divisors, whose sum is σ = 20654408. Its totient is φ = 20654406.

The previous prime is 20654353. The next prime is 20654411. The reversal of 20654407 is 70445602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20654407 - 2⁷ = 20654279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20654477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327203 + 10327204.

It is an arithmetic number, because the mean of its divisors is an integer number (10327204).

Almost surely, 2^20654407 is an apocalyptic number.

20654407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20654407 is an equidigital number, since it uses as much as digits as its factorization.

20654407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20654407 is about 4544.7119820732. The cubic root of 20654407 is about 274.3706024586.

The spelling of 20654407 in words is "twenty million, six hundred fifty-four thousand, four hundred seven".