20662512019 has 8 divisors (see below), whose sum is σ = 20701273280. Its totient is φ = 20623787136.

The previous prime is 20662512007. The next prime is 20662512043. The reversal of 20662512019 is 91021526602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20662512019 is a prime.

It is a super-2 number, since 2×20662512019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662512089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297942 + ... + 1313764.

It is an arithmetic number, because the mean of its divisors is an integer number (2587659160).

Almost surely, 2^20662512019 is an apocalyptic number.

20662512019 is a deficient number, since it is larger than the sum of its proper divisors (38761261).

20662512019 is a wasteful number, since it uses less digits than its factorization.

20662512019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18189.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 20662512019 in words is "twenty billion, six hundred sixty-two million, five hundred twelve thousand, nineteen".