20664741741 has 8 divisors (see below), whose sum is σ = 31489130304. Its totient is φ = 11808423840.

The previous prime is 20664741733. The next prime is 20664741749. The reversal of 20664741741 is 14714746602.

It is an interprime number because it is at equal distance from previous prime (20664741733) and next prime (20664741749).

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

It is not a de Polignac number, because 20664741741 - 2³ = 20664741733 is a prime.

It is a super-2 number, since 2×20664741741² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20664741693 and 20664741702.

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 7 ways as a sum of consecutive naturals, for example, 492017640 + ... + 492017681.

It is an arithmetic number, because the mean of its divisors is an integer number (3936141288).

Almost surely, 2^20664741741 is an apocalyptic number.

20664741741 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20664741741 is a deficient number, since it is larger than the sum of its proper divisors (10824388563).

20664741741 is an equidigital number, since it uses as much as digits as its factorization.

20664741741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984035331.

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 20664741741 in words is "twenty billion, six hundred sixty-four million, seven hundred forty-one thousand, seven hundred forty-one".