20269381 has 8 divisors (see below), whose sum is σ = 22825728. Its totient is φ = 17832000.

The previous prime is 20269349. The next prime is 20269421. The reversal of 20269381 is 18396202.

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 20269381 - 2⁵ = 20269349 is a prime.

It is a super-2 number, since 2×20269381² = 821695612246322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29380 + ... + 30061.

It is an arithmetic number, because the mean of its divisors is an integer number (2853216).

Almost surely, 2^20269381 is an apocalyptic number.

It is an amenable number.

20269381 is a deficient number, since it is larger than the sum of its proper divisors (2556347).

20269381 is a wasteful number, since it uses less digits than its factorization.

20269381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59483.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20269381 is about 4502.1529294328. The cubic root of 20269381 is about 272.6550182699.

The spelling of 20269381 in words is "twenty million, two hundred sixty-nine thousand, three hundred eighty-one".