20401143411 has 32 divisors (see below), whose sum is σ = 29968899840. Its totient is φ = 12343974720.

The previous prime is 20401143409. The next prime is 20401143421. The reversal of 20401143411 is 11434110402.

It is not a de Polignac number, because 20401143411 - 2¹ = 20401143409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401143401) 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, 2627511 + ... + 2635263.

It is an arithmetic number, because the mean of its divisors is an integer number (936528120).

Almost surely, 2^20401143411 is an apocalyptic number.

20401143411 is a deficient number, since it is larger than the sum of its proper divisors (9567756429).

20401143411 is an equidigital number, since it uses as much as digits as its factorization.

20401143411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448 (or 8426 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20401143411 its reverse (11434110402), we get a palindrome (31835253813).

The spelling of 20401143411 in words is "twenty billion, four hundred one million, one hundred forty-three thousand, four hundred eleven".