20342154 has 24 divisors (see below), whose sum is σ = 47327328. Its totient is φ = 5811960.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342154 is 45124302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20342154.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34302 + ... + 34889.

It is an arithmetic number, because the mean of its divisors is an integer number (1971972).

Almost surely, 2^20342154 is an apocalyptic number.

20342154 is an abundant number, since it is smaller than the sum of its proper divisors (26985174).

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

20342154 is a wasteful number, since it uses less digits than its factorization.

20342154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69210 (or 69203 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20342154 is about 4510.2277104377. The cubic root of 20342154 is about 272.9809322646.

Adding to 20342154 its reverse (45124302), we get a palindrome (65466456).

The spelling of 20342154 in words is "twenty million, three hundred forty-two thousand, one hundred fifty-four".