20696280 has 64 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 5016960.

The previous prime is 20696279. The next prime is 20696281. The reversal of 20696280 is 8269602.

It is an interprime number because it is at equal distance from previous prime (20696279) and next prime (20696281).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6520 + ... + 9159.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^20696280 is an apocalyptic number.

20696280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20696280 is an abundant number, since it is smaller than the sum of its proper divisors (47041320).

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

20696280 is a wasteful number, since it uses less digits than its factorization.

20696280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15704 (or 15700 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20696280 is about 4549.3164321687. The cubic root of 20696280 is about 274.5558892308. Note that the first 3 decimals are identical.

The spelling of 20696280 in words is "twenty million, six hundred ninety-six thousand, two hundred eighty".