20694156 has 48 divisors (see below), whose sum is σ = 56023296. Its totient is φ = 5822784.

The previous prime is 20694131. The next prime is 20694161. The reversal of 20694156 is 65149602.

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, 3790 + ... + 7466.

It is an arithmetic number, because the mean of its divisors is an integer number (1167152).

Almost surely, 2^20694156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20694156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28011648).

20694156 is an abundant number, since it is smaller than the sum of its proper divisors (35329140).

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

20694156 is a wasteful number, since it uses less digits than its factorization.

20694156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758 (or 3756 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20694156 is about 4549.0829845146. The cubic root of 20694156 is about 274.5464966143.

The spelling of 20694156 in words is "twenty million, six hundred ninety-four thousand, one hundred fifty-six".