20693500 has 24 divisors (see below), whose sum is σ = 45195696. Its totient is φ = 8277200.

The previous prime is 20693473. The next prime is 20693509. The reversal of 20693500 is 539602.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20693509) 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, 20194 + ... + 21193.

It is an arithmetic number, because the mean of its divisors is an integer number (1883154).

Almost surely, 2^20693500 is an apocalyptic number.

20693500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20693500 is an abundant number, since it is smaller than the sum of its proper divisors (24502196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20693500 is a wasteful number, since it uses less digits than its factorization.

20693500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41406 (or 41394 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 20693500 is about 4549.0108814994. The cubic root of 20693500 is about 274.5435955634.

The spelling of 20693500 in words is "twenty million, six hundred ninety-three thousand, five hundred".