20216464237 has 2 divisors, whose sum is σ = 20216464238. Its totient is φ = 20216464236.

The previous prime is 20216464211. The next prime is 20216464309. The reversal of 20216464237 is 73246461202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18388987236 + 1827477001 = 135606^2 + 42749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20216464237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20216464196 and 20216464205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20216464937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10108232118 + 10108232119.

It is an arithmetic number, because the mean of its divisors is an integer number (10108232119).

Almost surely, 2^20216464237 is an apocalyptic number.

It is an amenable number.

20216464237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20216464237 is an equidigital number, since it uses as much as digits as its factorization.

20216464237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 20216464237 in words is "twenty billion, two hundred sixteen million, four hundred sixty-four thousand, two hundred thirty-seven".