20423434 has 8 divisors (see below), whose sum is σ = 31066848. Its totient is φ = 10067820.

The previous prime is 20423407. The next prime is 20423441. The reversal of 20423434 is 43432402.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71772 + ... + 72055.

It is an arithmetic number, because the mean of its divisors is an integer number (3883356).

Almost surely, 2^20423434 is an apocalyptic number.

20423434 is a deficient number, since it is larger than the sum of its proper divisors (10643414).

20423434 is a wasteful number, since it uses less digits than its factorization.

20423434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143900.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 20423434 is about 4519.2293590832. The cubic root of 20423434 is about 273.3440272768.

Adding to 20423434 its reverse (43432402), we get a palindrome (63855836).

It can be divided in two parts, 2042 and 3434, that added together give a square (5476 = 74²).

The spelling of 20423434 in words is "twenty million, four hundred twenty-three thousand, four hundred thirty-four".