20424712 has 64 divisors (see below), whose sum is σ = 48522240. Its totient is φ = 7828800.

The previous prime is 20424707. The next prime is 20424721. The reversal of 20424712 is 21742402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43503 + ... + 43969.

It is an arithmetic number, because the mean of its divisors is an integer number (758160).

Almost surely, 2^20424712 is an apocalyptic number.

20424712 is a gapful number since it is divisible by the number (22) 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 20424712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24261120).

20424712 is an abundant number, since it is smaller than the sum of its proper divisors (28097528).

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

20424712 is a wasteful number, since it uses less digits than its factorization.

20424712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 20424712 is about 4519.3707526602. The cubic root of 20424712 is about 273.3497286748.

The spelling of 20424712 in words is "twenty million, four hundred twenty-four thousand, seven hundred twelve".