20691743284 has 24 divisors (see below), whose sum is σ = 36729455616. Its totient is φ = 10197684000.

The previous prime is 20691743269. The next prime is 20691743323. The reversal of 20691743284 is 48234719602.

It is a happy number.

It is a super-3 number, since 3×20691743284³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863469 + ... + 1874539.

It is an arithmetic number, because the mean of its divisors is an integer number (1530393984).

Almost surely, 2^20691743284 is an apocalyptic number.

It is an amenable number.

20691743284 is a deficient number, since it is larger than the sum of its proper divisors (16037712332).

20691743284 is a wasteful number, since it uses less digits than its factorization.

20691743284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17727 (or 17725 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 20691743284 in words is "twenty billion, six hundred ninety-one million, seven hundred forty-three thousand, two hundred eighty-four".