20645022166031 has 8 divisors (see below), whose sum is σ = 20766098882304. Its totient is φ = 20524090890240.

The previous prime is 20645022166007. The next prime is 20645022166073. The reversal of 20645022166031 is 13066122054602.

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

It is a cyclic number.

It is not a de Polignac number, because 20645022166031 - 2⁴² = 16246975654927 is a prime.

It is a super-2 number, since 2×20645022166031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645022166091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36075386 + ... + 36643191.

It is an arithmetic number, because the mean of its divisors is an integer number (2595762360288).

Almost surely, 2^{20645022166031} is an apocalyptic number.

20645022166031 is a deficient number, since it is larger than the sum of its proper divisors (121076716273).

20645022166031 is a wasteful number, since it uses less digits than its factorization.

20645022166031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72720241.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 20645022166031 in words is "twenty trillion, six hundred forty-five billion, twenty-two million, one hundred sixty-six thousand, thirty-one".