20351667017 has 4 divisors (see below), whose sum is σ = 22201818576. Its totient is φ = 18501515460.

The previous prime is 20351667013. The next prime is 20351667019. The reversal of 20351667017 is 71076615302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20351667017 - 2² = 20351667013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20351667013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925075763 + ... + 925075784.

It is an arithmetic number, because the mean of its divisors is an integer number (5550454644).

Almost surely, 2^20351667017 is an apocalyptic number.

It is an amenable number.

20351667017 is a deficient number, since it is larger than the sum of its proper divisors (1850151559).

20351667017 is a wasteful number, since it uses less digits than its factorization.

20351667017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850151558.

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 20351667017 in words is "twenty billion, three hundred fifty-one million, six hundred sixty-seven thousand, seventeen".