20699493 has 8 divisors (see below), whose sum is σ = 29052000. Its totient is φ = 13073328.

The previous prime is 20699491. The next prime is 20699507. The reversal of 20699493 is 39499602.

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

It is not a de Polignac number, because 20699493 - 2¹ = 20699491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20699491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181518 + ... + 181631.

It is an arithmetic number, because the mean of its divisors is an integer number (3631500).

Almost surely, 2^20699493 is an apocalyptic number.

It is an amenable number.

20699493 is a deficient number, since it is larger than the sum of its proper divisors (8352507).

20699493 is a wasteful number, since it uses less digits than its factorization.

20699493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363171.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 20699493 is about 4549.6695484398. The cubic root of 20699493 is about 274.5700963319.

It can be divided in two parts, 206 and 99493, that added together give a palindrome (99699).

The spelling of 20699493 in words is "twenty million, six hundred ninety-nine thousand, four hundred ninety-three".