20690192 has 10 divisors (see below), whose sum is σ = 40087278. Its totient is φ = 10345088.

The previous prime is 20690177. The next prime is 20690209. The reversal of 20690192 is 29109602.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 295936 = 4516^2 + 544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646553 + ... + 646584.

Almost surely, 2^20690192 is an apocalyptic number.

It is an amenable number.

20690192 is a deficient number, since it is larger than the sum of its proper divisors (19397086).

20690192 is a wasteful number, since it uses less digits than its factorization.

20690192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293145 (or 1293139 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20690192 is about 4548.6472714424. The cubic root of 20690192 is about 274.5289655489.

Adding to 20690192 its reverse (29109602), we get a palindrome (49799794).

The spelling of 20690192 in words is "twenty million, six hundred ninety thousand, one hundred ninety-two".