20464938 has 48 divisors (see below), whose sum is σ = 50275680. Its totient is φ = 5964192.

The previous prime is 20464937. The next prime is 20464973. The reversal of 20464938 is 83946402.

It is a happy number.

20464938 is a `hidden beast` number, since 2 + 0 + 4 + 649 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (20464937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2145 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (1047410).

Almost surely, 2^20464938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20464938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25137840).

20464938 is an abundant number, since it is smaller than the sum of its proper divisors (29810742).

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

20464938 is a wasteful number, since it uses less digits than its factorization.

20464938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643 (or 4640 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20464938 is about 4523.8189618949. The cubic root of 20464938 is about 273.5290629936.

The spelling of 20464938 in words is "twenty million, four hundred sixty-four thousand, nine hundred thirty-eight".