20674420 has 48 divisors (see below), whose sum is σ = 47190528. Its totient is φ = 7562880.

The previous prime is 20674417. The next prime is 20674429. The reversal of 20674420 is 2447602.

20674420 = T₂₅₉ + T₂₆₀ + ... + T₅₂₀.

20674420 = 1167² + 1168² + ... + 1181².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33757 + ... + 34363.

It is an arithmetic number, because the mean of its divisors is an integer number (983136).

Almost surely, 2^20674420 is an apocalyptic number.

20674420 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 20674420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23595264).

20674420 is an abundant number, since it is smaller than the sum of its proper divisors (26516108).

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

20674420 is a wasteful number, since it uses less digits than its factorization.

20674420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 20674420 is about 4546.9132386708. The cubic root of 20674420 is about 274.4591905959.

The spelling of 20674420 in words is "twenty million, six hundred seventy-four thousand, four hundred twenty".