20736464 has 40 divisors (see below), whose sum is σ = 48621888. Its totient is φ = 8363520.

The previous prime is 20736461. The next prime is 20736491. The reversal of 20736464 is 46463702.

It is a self number, because there is not a number n which added to its sum of digits gives 20736464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20736461) 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, 3542 + ... + 7349.

Almost surely, 2^20736464 is an apocalyptic number.

It is an amenable number.

20736464 is an abundant number, since it is smaller than the sum of its proper divisors (27885424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20736464 is a wasteful number, since it uses less digits than its factorization.

20736464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10923 (or 10917 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 20736464 is about 4553.7307781642. The cubic root of 20736464 is about 274.7334673773.

The spelling of 20736464 in words is "twenty million, seven hundred thirty-six thousand, four hundred sixty-four".