20401613747 has 2 divisors, whose sum is σ = 20401613748. Its totient is φ = 20401613746.

The previous prime is 20401613741. The next prime is 20401613761. The reversal of 20401613747 is 74731610402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20401613747 - 2²⁴ = 20384836531 is a prime.

It is not a weakly prime, because it can be changed into another prime (20401613741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200806873 + 10200806874.

It is an arithmetic number, because the mean of its divisors is an integer number (10200806874).

Almost surely, 2^20401613747 is an apocalyptic number.

20401613747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401613747 is an equidigital number, since it uses as much as digits as its factorization.

20401613747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 20401613747 in words is "twenty billion, four hundred one million, six hundred thirteen thousand, seven hundred forty-seven".