20343771 has 24 divisors (see below), whose sum is σ = 35061840. Its totient is φ = 11624256.

The previous prime is 20343767. The next prime is 20343787. The reversal of 20343771 is 17734302.

It is not a de Polignac number, because 20343771 - 2² = 20343767 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20343751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6366 + ... + 9011.

It is an arithmetic number, because the mean of its divisors is an integer number (1460910).

Almost surely, 2^20343771 is an apocalyptic number.

20343771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20343771 is a deficient number, since it is larger than the sum of its proper divisors (14718069).

20343771 is a wasteful number, since it uses less digits than its factorization.

20343771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400 (or 15387 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20343771 is about 4510.4069661174. The cubic root of 20343771 is about 272.9881651674.

The spelling of 20343771 in words is "twenty million, three hundred forty-three thousand, seven hundred seventy-one".