213661700019 has 32 divisors (see below), whose sum is σ = 320974775040. Its totient is φ = 140444870976.

The previous prime is 213661699991. The next prime is 213661700033. The reversal of 213661700019 is 910007166312.

213661700019 is a `hidden beast` number, since 2 + 1 + 36 + 617 + 0 + 0 + 0 + 1 + 9 = 666.

It is not a de Polignac number, because 213661700019 - 2⁷ = 213661699891 is a prime.

It is a super-2 number, since 2×213661700019² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213661700069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6817824 + ... + 6849090.

It is an arithmetic number, because the mean of its divisors is an integer number (10030461720).

Almost surely, 2^213661700019 is an apocalyptic number.

213661700019 is a deficient number, since it is larger than the sum of its proper divisors (107313075021).

213661700019 is a wasteful number, since it uses less digits than its factorization.

213661700019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34816 (or 34810 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 213661700019 in words is "two hundred thirteen billion, six hundred sixty-one million, seven hundred thousand, nineteen".