20692667 has 2 divisors, whose sum is σ = 20692668. Its totient is φ = 20692666.

The previous prime is 20692649. The next prime is 20692681. The reversal of 20692667 is 76629602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20692667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20692667.

It is not a weakly prime, because it can be changed into another prime (20692627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10346333 + 10346334.

It is an arithmetic number, because the mean of its divisors is an integer number (10346334).

Almost surely, 2^20692667 is an apocalyptic number.

20692667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20692667 is an equidigital number, since it uses as much as digits as its factorization.

20692667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20692667 is about 4548.9193222127. The cubic root of 20692667 is about 274.5399116709.

The spelling of 20692667 in words is "twenty million, six hundred ninety-two thousand, six hundred sixty-seven".