20401536343 has 2 divisors, whose sum is σ = 20401536344. Its totient is φ = 20401536342.

The previous prime is 20401536257. The next prime is 20401536359. The reversal of 20401536343 is 34363510402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20401536343 - 2¹³ = 20401528151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401536143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200768171 + 10200768172.

It is an arithmetic number, because the mean of its divisors is an integer number (10200768172).

Almost surely, 2^20401536343 is an apocalyptic number.

20401536343 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401536343 is an equidigital number, since it uses as much as digits as its factorization.

20401536343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

The spelling of 20401536343 in words is "twenty billion, four hundred one million, five hundred thirty-six thousand, three hundred forty-three".