20298642 has 96 divisors (see below), whose sum is σ = 52399872. Its totient is φ = 5193216.

The previous prime is 20298613. The next prime is 20298643. The reversal of 20298642 is 24689202.

It is not an unprimeable number, because it can be changed into a prime (20298643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179578 + ... + 179690.

It is an arithmetic number, because the mean of its divisors is an integer number (545832).

Almost surely, 2^20298642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20298642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26199936).

20298642 is an abundant number, since it is smaller than the sum of its proper divisors (32101230).

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

20298642 is a wasteful number, since it uses less digits than its factorization.

20298642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20298642 is about 4505.4014249565. The cubic root of 20298642 is about 272.7861573257.

The spelling of 20298642 in words is "twenty million, two hundred ninety-eight thousand, six hundred forty-two".