20226402 has 64 divisors (see below), whose sum is σ = 52143360. Its totient is φ = 5692032.

The previous prime is 20226397. The next prime is 20226421. The reversal of 20226402 is 20462202.

It is a happy number.

20226402 is a `hidden beast` number, since 2 + 0 + 22 + 640 + 2 = 666.

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

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, 27228 + ... + 27960.

It is an arithmetic number, because the mean of its divisors is an integer number (814740).

Almost surely, 2^20226402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20226402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26071680).

20226402 is an abundant number, since it is smaller than the sum of its proper divisors (31916958).

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

20226402 is a wasteful number, since it uses less digits than its factorization.

20226402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

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

The square root of 20226402 is about 4497.3772356786. The cubic root of 20226402 is about 272.4621702107.

Adding to 20226402 its reverse (20462202), we get a palindrome (40688604).

The spelling of 20226402 in words is "twenty million, two hundred twenty-six thousand, four hundred two".