20694481 has 8 divisors (see below), whose sum is σ = 21368160. Its totient is φ = 20029632.

The previous prime is 20694469. The next prime is 20694493. The reversal of 20694481 is 18449602.

It is an interprime number because it is at equal distance from previous prime (20694469) and next prime (20694493).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20694481 - 2⁵ = 20694449 is a prime.

It is a super-2 number, since 2×20694481² = 856523087718722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20694881) 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, 2730 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (2671020).

Almost surely, 2^20694481 is an apocalyptic number.

It is an amenable number.

20694481 is a deficient number, since it is larger than the sum of its proper divisors (673679).

20694481 is a wasteful number, since it uses less digits than its factorization.

20694481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20694481 is about 4549.1187058594. The cubic root of 20694481 is about 274.5479338501.

It can be divided in two parts, 206944 and 81, that added together give a square (207025 = 455²).

The spelling of 20694481 in words is "twenty million, six hundred ninety-four thousand, four hundred eighty-one".