20740464 has 30 divisors (see below), whose sum is σ = 58044896. Its totient is φ = 6913440.

The previous prime is 20740463. The next prime is 20740469. The reversal of 20740464 is 46404702.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71872 + ... + 72159.

Almost surely, 2^20740464 is an apocalyptic number.

20740464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20740464 is an abundant number, since it is smaller than the sum of its proper divisors (37304432).

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

20740464 is a wasteful number, since it uses less digits than its factorization.

20740464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144045 (or 144036 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20740464 is about 4554.1699573029. The cubic root of 20740464 is about 274.7511313213.

The spelling of 20740464 in words is "twenty million, seven hundred forty thousand, four hundred sixty-four".