20001051616 has 96 divisors (see below), whose sum is σ = 51315042240. Its totient is φ = 7447044096.

The previous prime is 20001051571. The next prime is 20001051647. The reversal of 20001051616 is 61615010002.

It is a super-2 number, since 2×20001051616² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152511 + ... + 251518.

It is an arithmetic number, because the mean of its divisors is an integer number (534531690).

Almost surely, 2^20001051616 is an apocalyptic number.

20001051616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20001051616 is an abundant number, since it is smaller than the sum of its proper divisors (31313990624).

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

20001051616 is a wasteful number, since it uses less digits than its factorization.

20001051616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404076 (or 404068 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 20001051616 its reverse (61615010002), we get a palindrome (81616061618).

The spelling of 20001051616 in words is "twenty billion, one million, fifty-one thousand, six hundred sixteen".