20242668 has 48 divisors (see below), whose sum is σ = 50029056. Its totient is φ = 6357120.

The previous prime is 20242603. The next prime is 20242687. The reversal of 20242668 is 86624202.

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, 19080 + ... + 20112.

It is an arithmetic number, because the mean of its divisors is an integer number (1042272).

Almost surely, 2^20242668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20242668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25014528).

20242668 is an abundant number, since it is smaller than the sum of its proper divisors (29786388).

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

20242668 is a wasteful number, since it uses less digits than its factorization.

20242668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20242668 is about 4499.1852595776. The cubic root of 20242668 is about 272.5351883409.

It can be divided in two parts, 20242 and 668, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20242668 in words is "twenty million, two hundred forty-two thousand, six hundred sixty-eight".