20246642 has 8 divisors (see below), whose sum is σ = 32706156. Its totient is φ = 9344592.

The previous prime is 20246621. The next prime is 20246657. The reversal of 20246642 is 24664202.

It can be written as a sum of positive squares in 2 ways, for example, as 20079361 + 167281 = 4481^2 + 409^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 778717 = 20246642 / (2 + 0 + 2 + 4 + 6 + 6 + 4 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389333 + ... + 389384.

Almost surely, 2^20246642 is an apocalyptic number.

20246642 is a deficient number, since it is larger than the sum of its proper divisors (12459514).

20246642 is a wasteful number, since it uses less digits than its factorization.

20246642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778732.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 20246642 is about 4499.6268734196. The cubic root of 20246642 is about 272.5530216945.

The spelling of 20246642 in words is "twenty million, two hundred forty-six thousand, six hundred forty-two".