20400214343 has 32 divisors (see below), whose sum is σ = 22505472000. Its totient is φ = 18430384896.

The previous prime is 20400214333. The next prime is 20400214349. The reversal of 20400214343 is 34341200402.

It is a cyclic number.

It is not a de Polignac number, because 20400214343 - 2¹² = 20400210247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400214349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6182108 + ... + 6185406.

It is an arithmetic number, because the mean of its divisors is an integer number (703296000).

Almost surely, 2^20400214343 is an apocalyptic number.

20400214343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20400214343 is a deficient number, since it is larger than the sum of its proper divisors (2105257657).

20400214343 is a wasteful number, since it uses less digits than its factorization.

20400214343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20400214343 its reverse (34341200402), we get a palindrome (54741414745).

The spelling of 20400214343 in words is "twenty billion, four hundred million, two hundred fourteen thousand, three hundred forty-three".