20156034 has 16 divisors (see below), whose sum is σ = 40375872. Its totient is φ = 6708048.

The previous prime is 20156029. The next prime is 20156063. The reversal of 20156034 is 43065102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20156034.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (2523492).

Almost surely, 2^20156034 is an apocalyptic number.

20156034 is an abundant number, since it is smaller than the sum of its proper divisors (20219838).

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

20156034 is a wasteful number, since it uses less digits than its factorization.

20156034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5321.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20156034 is about 4489.5471932033. The cubic root of 20156034 is about 272.1458362260.

The spelling of 20156034 in words is "twenty million, one hundred fifty-six thousand, thirty-four".