20934480 has 160 divisors (see below), whose sum is σ = 78637824. Its totient is φ = 4497408.

The previous prime is 20934469. The next prime is 20934481. The reversal of 20934480 is 8443902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28194 + ... + 28926.

Almost surely, 2^20934480 is an apocalyptic number.

20934480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20934480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39318912).

20934480 is an abundant number, since it is smaller than the sum of its proper divisors (57703344).

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

20934480 is a wasteful number, since it uses less digits than its factorization.

20934480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20934480 is about 4575.4212920779. The cubic root of 20934480 is about 275.6051906002.

The spelling of 20934480 in words is "twenty million, nine hundred thirty-four thousand, four hundred eighty".