20274289420 has 192 divisors, whose sum is σ = 57403551744. Its totient is φ = 5820641280.

The previous prime is 20274289361. The next prime is 20274289459. The reversal of 20274289420 is 2498247202.

It is a super-2 number, since 2×20274289420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1222222 + ... + 1238698.

It is an arithmetic number, because the mean of its divisors is an integer number (298976832).

Almost surely, 2^20274289420 is an apocalyptic number.

20274289420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20274289420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28701775872).

20274289420 is an abundant number, since it is smaller than the sum of its proper divisors (37129262324).

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

20274289420 is a wasteful number, since it uses less digits than its factorization.

20274289420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16568 (or 16566 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 20274289420 in words is "twenty billion, two hundred seventy-four million, two hundred eighty-nine thousand, four hundred twenty".