20101343409 has 24 divisors (see below), whose sum is σ = 33237900800. Its totient is φ = 11467536768.

The previous prime is 20101343407. The next prime is 20101343413. The reversal of 20101343409 is 90434310102.

20101343409 is a `hidden beast` number, since 201 + 0 + 13 + 43 + 409 = 666.

It is not a de Polignac number, because 20101343409 - 2¹ = 20101343407 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20101343401) 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, 224584 + ... + 301065.

Almost surely, 2^20101343409 is an apocalyptic number.

It is an amenable number.

20101343409 is a deficient number, since it is larger than the sum of its proper divisors (13136557391).

20101343409 is a wasteful number, since it uses less digits than its factorization.

20101343409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526269 (or 526266 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 20101343409 in words is "twenty billion, one hundred one million, three hundred forty-three thousand, four hundred nine".