20424984 has 16 divisors (see below), whose sum is σ = 51062520. Its totient is φ = 6808320.

The previous prime is 20424983. The next prime is 20425021. The reversal of 20424984 is 48942402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425497 + ... + 425544.

Almost surely, 2^20424984 is an apocalyptic number.

20424984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20424984 is an abundant number, since it is smaller than the sum of its proper divisors (30637536).

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

20424984 is a wasteful number, since it uses less digits than its factorization.

20424984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851050 (or 851046 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20424984 is about 4519.4008452449. The cubic root of 20424984 is about 273.3509420872.

The spelling of 20424984 in words is "twenty million, four hundred twenty-four thousand, nine hundred eighty-four".