20356049 has 16 divisors (see below), whose sum is σ = 25092480. Its totient is φ = 16122240.

The previous prime is 20356043. The next prime is 20356051. The reversal of 20356049 is 94065302.

It is a cyclic number.

It is not a de Polignac number, because 20356049 - 2⁴ = 20356033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20356043) 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, 3587 + ... + 7319.

It is an arithmetic number, because the mean of its divisors is an integer number (1568280).

Almost surely, 2^20356049 is an apocalyptic number.

It is an amenable number.

20356049 is a deficient number, since it is larger than the sum of its proper divisors (4736431).

20356049 is a wasteful number, since it uses less digits than its factorization.

20356049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20356049 is about 4511.7678353390. The cubic root of 20356049 is about 273.0430726315.

The spelling of 20356049 in words is "twenty million, three hundred fifty-six thousand, forty-nine".