20650156 has 24 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 10146000.

The previous prime is 20650153. The next prime is 20650163. The reversal of 20650156 is 65105602.

It is a self number, because there is not a number n which added to its sum of digits gives 20650156.

It is not an unprimeable number, because it can be changed into a prime (20650153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108021 + ... + 108211.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^20650156 is an apocalyptic number.

It is an amenable number.

20650156 is a deficient number, since it is larger than the sum of its proper divisors (16121684).

20650156 is a wasteful number, since it uses less digits than its factorization.

20650156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20650156 is about 4544.2442716034. The cubic root of 20650156 is about 274.3517779133.

Adding to 20650156 its reverse (65105602), we get a palindrome (85755758).

The spelling of 20650156 in words is "twenty million, six hundred fifty thousand, one hundred fifty-six".