20664741742 has 8 divisors (see below), whose sum is σ = 31421730816. Its totient is φ = 10190831472.

The previous prime is 20664741733. The next prime is 20664741749. The reversal of 20664741742 is 24714746602.

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

It is a super-3 number, since 3×20664741742³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664741749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70769518 + ... + 70769809.

It is an arithmetic number, because the mean of its divisors is an integer number (3927716352).

Almost surely, 2^20664741742 is an apocalyptic number.

20664741742 is a deficient number, since it is larger than the sum of its proper divisors (10756989074).

20664741742 is a wasteful number, since it uses less digits than its factorization.

20664741742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141539402.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 20664741742 in words is "twenty billion, six hundred sixty-four million, seven hundred forty-one thousand, seven hundred forty-two".