20744632 has 8 divisors (see below), whose sum is σ = 38896200. Its totient is φ = 10372312.

The previous prime is 20744627. The next prime is 20744639. The reversal of 20744632 is 23644702.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20744632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20744639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1296532 + ... + 1296547.

It is an arithmetic number, because the mean of its divisors is an integer number (4862025).

Almost surely, 2^20744632 is an apocalyptic number.

It is an amenable number.

20744632 is a deficient number, since it is larger than the sum of its proper divisors (18151568).

20744632 is a wasteful number, since it uses less digits than its factorization.

20744632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593085 (or 2593081 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20744632 is about 4554.6275369123. The cubic root of 20744632 is about 274.7695347350.

The spelling of 20744632 in words is "twenty million, seven hundred forty-four thousand, six hundred thirty-two".