20976607 has 2 divisors, whose sum is σ = 20976608. Its totient is φ = 20976606.

The previous prime is 20976587. The next prime is 20976611. The reversal of 20976607 is 70667902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20976607 - 2⁷ = 20976479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20976107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10488303 + 10488304.

It is an arithmetic number, because the mean of its divisors is an integer number (10488304).

Almost surely, 2^20976607 is an apocalyptic number.

20976607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20976607 is an equidigital number, since it uses as much as digits as its factorization.

20976607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 20976607 is about 4580.0225981975. The cubic root of 20976607 is about 275.7899359036.

The spelling of 20976607 in words is "twenty million, nine hundred seventy-six thousand, six hundred seven".