20133377947 has 2 divisors, whose sum is σ = 20133377948. Its totient is φ = 20133377946.

The previous prime is 20133377941. The next prime is 20133377951. The reversal of 20133377947 is 74977333102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20133377947 - 2³ = 20133377939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20133377897 and 20133377906.

It is not a weakly prime, because it can be changed into another prime (20133377941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066688973 + 10066688974.

It is an arithmetic number, because the mean of its divisors is an integer number (10066688974).

Almost surely, 2^20133377947 is an apocalyptic number.

20133377947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20133377947 is an equidigital number, since it uses as much as digits as its factorization.

20133377947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 46.

The spelling of 20133377947 in words is "twenty billion, one hundred thirty-three million, three hundred seventy-seven thousand, nine hundred forty-seven".