20210120019 has 24 divisors (see below), whose sum is σ = 29377444512. Its totient is φ = 13388094720.

The previous prime is 20210120009. The next prime is 20210120027. The reversal of 20210120019 is 91002101202.

It is not a de Polignac number, because 20210120019 - 2⁹ = 20210119507 is a prime.

It is a super-2 number, since 2×20210120019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210119983 and 20210120010.

It is not an unprimeable number, because it can be changed into a prime (20210120009) 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, 5464779 + ... + 5468475.

It is an arithmetic number, because the mean of its divisors is an integer number (1224060188).

Almost surely, 2^20210120019 is an apocalyptic number.

20210120019 is a deficient number, since it is larger than the sum of its proper divisors (9167324493).

20210120019 is a wasteful number, since it uses less digits than its factorization.

20210120019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387 (or 7384 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 20210120019 in words is "twenty billion, two hundred ten million, one hundred twenty thousand, nineteen".