20956498 has 8 divisors (see below), whose sum is σ = 31465980. Its totient is φ = 10467840.

The previous prime is 20956493. The next prime is 20956499. The reversal of 20956498 is 89465902.

It can be written as a sum of positive squares in 2 ways, for example, as 20948929 + 7569 = 4577^2 + 87^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20956493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383 + ... + 6898.

Almost surely, 2^20956498 is an apocalyptic number.

20956498 is a deficient number, since it is larger than the sum of its proper divisors (10509482).

20956498 is a wasteful number, since it uses less digits than its factorization.

20956498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10412.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 20956498 is about 4577.8267769762. The cubic root of 20956498 is about 275.7017800367.

The spelling of 20956498 in words is "twenty million, nine hundred fifty-six thousand, four hundred ninety-eight".