20401747211 has 4 divisors (see below), whose sum is σ = 21475523400. Its totient is φ = 19327971024.

The previous prime is 20401747199. The next prime is 20401747291. The reversal of 20401747211 is 11274710402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20401747211 - 2³⁴ = 3221878027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401747291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536888066 + ... + 536888103.

It is an arithmetic number, because the mean of its divisors is an integer number (5368880850).

Almost surely, 2^20401747211 is an apocalyptic number.

20401747211 is a deficient number, since it is larger than the sum of its proper divisors (1073776189).

20401747211 is a wasteful number, since it uses less digits than its factorization.

20401747211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073776188.

The product of its (nonzero) digits is 3136, while the sum is 29.

The spelling of 20401747211 in words is "twenty billion, four hundred one million, seven hundred forty-seven thousand, two hundred eleven".