20211010019 has 4 divisors (see below), whose sum is σ = 20246038344. Its totient is φ = 20175981696.

The previous prime is 20211010007. The next prime is 20211010033. The reversal of 20211010019 is 91001011202.

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 20211010019 - 2⁴ = 20211010003 is a prime.

It is a super-2 number, since 2×20211010019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211009979 and 20211010006.

It is not an unprimeable number, because it can be changed into a prime (20211010069) 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, 17513297 + ... + 17514450.

It is an arithmetic number, because the mean of its divisors is an integer number (5061509586).

Almost surely, 2^20211010019 is an apocalyptic number.

20211010019 is a deficient number, since it is larger than the sum of its proper divisors (35028325).

20211010019 is an equidigital number, since it uses as much as digits as its factorization.

20211010019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35028324.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20211010019 in words is "twenty billion, two hundred eleven million, ten thousand, nineteen".