20612161420 has 24 divisors (see below), whose sum is σ = 43295029344. Its totient is φ = 8243056896.

The previous prime is 20612161403. The next prime is 20612161433. The reversal of 20612161420 is 2416121602.

It is a happy number.

It is a super-2 number, since 2×20612161420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17512 + ... + 203791.

It is an arithmetic number, because the mean of its divisors is an integer number (1803959556).

Almost surely, 2^20612161420 is an apocalyptic number.

20612161420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20612161420 is an abundant number, since it is smaller than the sum of its proper divisors (22682867924).

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

20612161420 is a wasteful number, since it uses less digits than its factorization.

20612161420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225969 (or 225967 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 20612161420 in words is "twenty billion, six hundred twelve million, one hundred sixty-one thousand, four hundred twenty".