20959434 has 12 divisors (see below), whose sum is σ = 45412146. Its totient is φ = 6986472.

The previous prime is 20959429. The next prime is 20959459. The reversal of 20959434 is 43495902.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 3294225 = 4203^2 + 1815^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 582189 + ... + 582224.

Almost surely, 2^20959434 is an apocalyptic number.

20959434 is an abundant number, since it is smaller than the sum of its proper divisors (24452712).

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

20959434 is a wasteful number, since it uses less digits than its factorization.

20959434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164421 (or 1164418 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20959434 is about 4578.1474419245. The cubic root of 20959434 is about 275.7146546850.

It can be divided in two parts, 209594 and 34, that added together give a triangular number (209628 = T₆₄₇).

The spelling of 20959434 in words is "twenty million, nine hundred fifty-nine thousand, four hundred thirty-four".