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19942020 = 22325731719
BaseRepresentation
bin100110000010…
…0101010000100
31101112011022100
41030010222010
520101121040
61551232100
7331335000
oct114045204
941464270
1019942020
111029080a
126818630
134192c17
142911700
151b3db30
hex1304a84

19942020 has 288 divisors, whose sum is σ = 78624000. Its totient is φ = 4064256.

The previous prime is 19942019. The next prime is 19942033. The reversal of 19942020 is 2024991.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1049571 + ... + 1049589.

It is an arithmetic number, because the mean of its divisors is an integer number (273000).

Almost surely, 219942020 is an apocalyptic number.

19942020 is a gapful number since it is divisible by the number (10) 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 19942020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39312000).

19942020 is an abundant number, since it is smaller than the sum of its proper divisors (58681980).

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

19942020 is a wasteful number, since it uses less digits than its factorization.

19942020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19942020 is about 4465.6488890194. The cubic root of 19942020 is about 271.1792045558.

The spelling of 19942020 in words is "nineteen million, nine hundred forty-two thousand, twenty".