20243970 has 48 divisors (see below), whose sum is σ = 53868672. Its totient is φ = 5271840.

The previous prime is 20243969. The next prime is 20243989. The reversal of 20243970 is 7934202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1255 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (1122264).

Almost surely, 2^20243970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20243970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26934336).

20243970 is an abundant number, since it is smaller than the sum of its proper divisors (33624702).

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

20243970 is a wasteful number, since it uses less digits than its factorization.

20243970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 5284 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20243970 is about 4499.3299501148. The cubic root of 20243970 is about 272.5410313323.

The spelling of 20243970 in words is "twenty million, two hundred forty-three thousand, nine hundred seventy".