213662020973 has 2 divisors, whose sum is σ = 213662020974. Its totient is φ = 213662020972.

The previous prime is 213662020961. The next prime is 213662020981. The reversal of 213662020973 is 379020266312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140024143204 + 73637877769 = 374198^2 + 271363^2 .

It is a cyclic number.

It is not a de Polignac number, because 213662020973 - 2⁸ = 213662020717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213662020973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213662020993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106831010486 + 106831010487.

It is an arithmetic number, because the mean of its divisors is an integer number (106831010487).

Almost surely, 2^213662020973 is an apocalyptic number.

It is an amenable number.

213662020973 is a deficient number, since it is larger than the sum of its proper divisors (1).

213662020973 is an equidigital number, since it uses as much as digits as its factorization.

213662020973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 213662020973 in words is "two hundred thirteen billion, six hundred sixty-two million, twenty thousand, nine hundred seventy-three".