20342620 has 12 divisors (see below), whose sum is σ = 42719544. Its totient is φ = 8137040.

The previous prime is 20342617. The next prime is 20342627. The reversal of 20342620 is 2624302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508546 + ... + 508585.

It is an arithmetic number, because the mean of its divisors is an integer number (3559962).

Almost surely, 2^20342620 is an apocalyptic number.

20342620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20342620 is an abundant number, since it is smaller than the sum of its proper divisors (22376924).

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

20342620 is a wasteful number, since it uses less digits than its factorization.

20342620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017140 (or 1017138 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20342620 is about 4510.2793705047. The cubic root of 20342620 is about 272.9830167397.

Adding to 20342620 its reverse (2624302), we get a palindrome (22966922).

The spelling of 20342620 in words is "twenty million, three hundred forty-two thousand, six hundred twenty".