20693642 has 8 divisors (see below), whose sum is σ = 31142496. Its totient is φ = 10312812.

The previous prime is 20693639. The next prime is 20693663. The reversal of 20693642 is 24639602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20693599 and 20693608.

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, 16238 + ... + 17465.

It is an arithmetic number, because the mean of its divisors is an integer number (3892812).

Almost surely, 2^20693642 is an apocalyptic number.

20693642 is a deficient number, since it is larger than the sum of its proper divisors (10448854).

20693642 is a wasteful number, since it uses less digits than its factorization.

20693642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34012.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20693642 is about 4549.0264892612. The cubic root of 20693642 is about 274.5442235400.

The spelling of 20693642 in words is "twenty million, six hundred ninety-three thousand, six hundred forty-two".