20420262 has 24 divisors (see below), whose sum is σ = 45883656. Its totient is φ = 6806592.

The previous prime is 20420243. The next prime is 20420287. The reversal of 20420262 is 26202402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 20523 + ... + 21494.

It is an arithmetic number, because the mean of its divisors is an integer number (1911819).

Almost surely, 2^20420262 is an apocalyptic number.

20420262 is an abundant number, since it is smaller than the sum of its proper divisors (25463394).

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

20420262 is an equidigital number, since it uses as much as digits as its factorization.

20420262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42034 (or 42022 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20420262 is about 4518.8784006654. The cubic root of 20420262 is about 273.3298753611.

Adding to 20420262 its reverse (26202402), we get a palindrome (46622664).

The spelling of 20420262 in words is "twenty million, four hundred twenty thousand, two hundred sixty-two".