20742162 has 64 divisors (see below), whose sum is σ = 49766400. Its totient is φ = 5639040.

The previous prime is 20742151. The next prime is 20742179. The reversal of 20742162 is 26124702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115789 + ... + 115967.

It is an arithmetic number, because the mean of its divisors is an integer number (777600).

Almost surely, 2^20742162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20742162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24883200).

20742162 is an abundant number, since it is smaller than the sum of its proper divisors (29024238).

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

20742162 is a wasteful number, since it uses less digits than its factorization.

20742162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20742162 is about 4554.3563760426. The cubic root of 20742162 is about 274.7586289789.

Adding to 20742162 its reverse (26124702), we get a palindrome (46866864).

The spelling of 20742162 in words is "twenty million, seven hundred forty-two thousand, one hundred sixty-two".