20960642 has 4 divisors (see below), whose sum is σ = 31440966. Its totient is φ = 10480320.

The previous prime is 20960627. The next prime is 20960669. The reversal of 20960642 is 24606902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24606902 = 2 ⋅12303451.

It can be written as a sum of positive squares in only one way, i.e., 18241441 + 2719201 = 4271^2 + 1649^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5240159 + ... + 5240162.

Almost surely, 2^20960642 is an apocalyptic number.

20960642 is a deficient number, since it is larger than the sum of its proper divisors (10480324).

20960642 is a wasteful number, since it uses less digits than its factorization.

20960642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10480323.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20960642 is about 4578.2793711175. The cubic root of 20960642 is about 275.7199515346.

The spelling of 20960642 in words is "twenty million, nine hundred sixty thousand, six hundred forty-two".