20162121036 has 24 divisors (see below), whose sum is σ = 47267916864. Its totient is φ = 6688854480.

The previous prime is 20162121017. The next prime is 20162121059. The reversal of 20162121036 is 63012126102.

It is a super-2 number, since 2×20162121036² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20162120997 and 20162121015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3978930 + ... + 3983993.

It is an arithmetic number, because the mean of its divisors is an integer number (1969496536).

Almost surely, 2^20162121036 is an apocalyptic number.

It is an amenable number.

20162121036 is an abundant number, since it is smaller than the sum of its proper divisors (27105795828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20162121036 is a wasteful number, since it uses less digits than its factorization.

20162121036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963141 (or 7963139 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 20162121036 its reverse (63012126102), we get a palindrome (83174247138).

The spelling of 20162121036 in words is "twenty billion, one hundred sixty-two million, one hundred twenty-one thousand, thirty-six".