20943502007 has 2 divisors, whose sum is σ = 20943502008. Its totient is φ = 20943502006.

The previous prime is 20943502003. The next prime is 20943502057. The reversal of 20943502007 is 70020534902.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20943502007 - 2² = 20943502003 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20943502003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10471751003 + 10471751004.

It is an arithmetic number, because the mean of its divisors is an integer number (10471751004).

Almost surely, 2^20943502007 is an apocalyptic number.

20943502007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943502007 is an equidigital number, since it uses as much as digits as its factorization.

20943502007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20943502007 in words is "twenty billion, nine hundred forty-three million, five hundred two thousand, seven".