20690032 has 30 divisors (see below), whose sum is σ = 44066624. Its totient is φ = 9403680.

The previous prime is 20690029. The next prime is 20690057. The reversal of 20690032 is 23009602.

It is a super-2 number, since 2×20690032² = 856154848322048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20689985 and 20690012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3408 + ... + 7279.

Almost surely, 2^20690032 is an apocalyptic number.

20690032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20690032 is an abundant number, since it is smaller than the sum of its proper divisors (23376592).

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

20690032 is a wasteful number, since it uses less digits than its factorization.

20690032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10717 (or 10700 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20690032 is about 4548.6296837619. The cubic root of 20690032 is about 274.5282578908.

Adding to 20690032 its reverse (23009602), we get a palindrome (43699634).

The spelling of 20690032 in words is "twenty million, six hundred ninety thousand, thirty-two".