20035043947 has 2 divisors, whose sum is σ = 20035043948. Its totient is φ = 20035043946.

The previous prime is 20035043927. The next prime is 20035044097. The reversal of 20035043947 is 74934053002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20035043947 - 2²³ = 20026655339 is a prime.

It is not a weakly prime, because it can be changed into another prime (20035043927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10017521973 + 10017521974.

It is an arithmetic number, because the mean of its divisors is an integer number (10017521974).

Almost surely, 2^20035043947 is an apocalyptic number.

20035043947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20035043947 is an equidigital number, since it uses as much as digits as its factorization.

20035043947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 20035043947 its reverse (74934053002), we get a palindrome (94969096949).

The spelling of 20035043947 in words is "twenty billion, thirty-five million, forty-three thousand, nine hundred forty-seven".