20423402 has 8 divisors (see below), whose sum is σ = 31967136. Its totient is φ = 9767692.

The previous prime is 20423401. The next prime is 20423407. The reversal of 20423402 is 20432402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20423401) 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, 221948 + ... + 222039.

It is an arithmetic number, because the mean of its divisors is an integer number (3995892).

Almost surely, 2^20423402 is an apocalyptic number.

20423402 is a deficient number, since it is larger than the sum of its proper divisors (11543734).

20423402 is a wasteful number, since it uses less digits than its factorization.

20423402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444012.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20423402 is about 4519.2258186552. The cubic root of 20423402 is about 273.3438845157.

Adding to 20423402 its reverse (20432402), we get a palindrome (40855804).

The spelling of 20423402 in words is "twenty million, four hundred twenty-three thousand, four hundred two".