20699492 has 12 divisors (see below), whose sum is σ = 39517296. Its totient is φ = 9408840.

The previous prime is 20699491. The next prime is 20699507. The reversal of 20699492 is 29499602.

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 3 ways as a sum of consecutive naturals, for example, 235178 + ... + 235265.

It is an arithmetic number, because the mean of its divisors is an integer number (3293108).

Almost surely, 2^20699492 is an apocalyptic number.

20699492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20699492 is a deficient number, since it is larger than the sum of its proper divisors (18817804).

20699492 is a wasteful number, since it uses less digits than its factorization.

20699492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470458 (or 470456 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 20699492 is about 4549.6694385417. The cubic root of 20699492 is about 274.5700919103.

The spelling of 20699492 in words is "twenty million, six hundred ninety-nine thousand, four hundred ninety-two".