20401234 has 32 divisors (see below), whose sum is σ = 35957376. Its totient is φ = 8501760.

The previous prime is 20401223. The next prime is 20401273. The reversal of 20401234 is 43210402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112624 + ... + 112804.

It is an arithmetic number, because the mean of its divisors is an integer number (1123668).

Almost surely, 2^20401234 is an apocalyptic number.

20401234 is a deficient number, since it is larger than the sum of its proper divisors (15556142).

20401234 is a wasteful number, since it uses less digits than its factorization.

20401234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20401234 is about 4516.7725202848. The cubic root of 20401234 is about 273.2449509342.

Adding to 20401234 its reverse (43210402), we get a palindrome (63611636).

The spelling of 20401234 in words is "twenty million, four hundred one thousand, two hundred thirty-four".