20650497 has 16 divisors (see below), whose sum is σ = 31595520. Its totient is φ = 11752272.

The previous prime is 20650489. The next prime is 20650499. The reversal of 20650497 is 79405602.

It is not a de Polignac number, because 20650497 - 2³ = 20650489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20650499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3654 + ... + 7392.

It is an arithmetic number, because the mean of its divisors is an integer number (1974720).

Almost surely, 2^20650497 is an apocalyptic number.

It is an amenable number.

20650497 is a deficient number, since it is larger than the sum of its proper divisors (10945023).

20650497 is a wasteful number, since it uses less digits than its factorization.

20650497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20650497 is about 4544.2817914386. The cubic root of 20650497 is about 274.3532880462.

The spelling of 20650497 in words is "twenty million, six hundred fifty thousand, four hundred ninety-seven".