20161692 has 18 divisors (see below), whose sum is σ = 50964368. Its totient is φ = 6720552.

The previous prime is 20161667. The next prime is 20161693. The reversal of 20161692 is 29616102.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20161693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279988 + ... + 280059.

Almost surely, 2^20161692 is an apocalyptic number.

It is an amenable number.

20161692 is an abundant number, since it is smaller than the sum of its proper divisors (30802676).

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

20161692 is a wasteful number, since it uses less digits than its factorization.

20161692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560057 (or 560052 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 20161692 is about 4490.1772793510. The cubic root of 20161692 is about 272.1712985282.

Adding to 20161692 its reverse (29616102), we get a palindrome (49777794).

The spelling of 20161692 in words is "twenty million, one hundred sixty-one thousand, six hundred ninety-two".