20690532 has 24 divisors (see below), whose sum is σ = 53642400. Its totient is φ = 6896808.

The previous prime is 20690531. The next prime is 20690539. The reversal of 20690532 is 23509602.

It is a super-2 number, since 2×20690532² = 856196228886048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20690496 and 20690505.

It is not an unprimeable number, because it can be changed into a prime (20690531) 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, 95682 + ... + 95897.

It is an arithmetic number, because the mean of its divisors is an integer number (2235100).

Almost surely, 2^20690532 is an apocalyptic number.

It is an amenable number.

20690532 is an abundant number, since it is smaller than the sum of its proper divisors (32951868).

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

20690532 is a wasteful number, since it uses less digits than its factorization.

20690532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191592 (or 191584 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20690532 is about 4548.6846450375. The cubic root of 20690532 is about 274.5304693103.

The spelling of 20690532 in words is "twenty million, six hundred ninety thousand, five hundred thirty-two".