20246687 has 2 divisors, whose sum is σ = 20246688. Its totient is φ = 20246686.

The previous prime is 20246683. The next prime is 20246701. The reversal of 20246687 is 78664202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20246687 - 2² = 20246683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20246683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123343 + 10123344.

It is an arithmetic number, because the mean of its divisors is an integer number (10123344).

Almost surely, 2^20246687 is an apocalyptic number.

20246687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246687 is an equidigital number, since it uses as much as digits as its factorization.

20246687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20246687 is about 4499.6318738315. The cubic root of 20246687 is about 272.5532236190.

The spelling of 20246687 in words is "twenty million, two hundred forty-six thousand, six hundred eighty-seven".