20423350 has 24 divisors (see below), whose sum is σ = 38388168. Its totient is φ = 8083200.

The previous prime is 20423329. The next prime is 20423353. The reversal of 20423350 is 5332402.

It is a super-2 number, since 2×20423350² = 834226450445000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2745 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (1599507).

Almost surely, 2^20423350 is an apocalyptic number.

20423350 is a deficient number, since it is larger than the sum of its proper divisors (17964818).

20423350 is a wasteful number, since it uses less digits than its factorization.

20423350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20423350 is about 4519.2200654538. The cubic root of 20423350 is about 273.3436525286.

Adding to 20423350 its reverse (5332402), we get a palindrome (25755752).

The spelling of 20423350 in words is "twenty million, four hundred twenty-three thousand, three hundred fifty".