19787652 has 60 divisors (see below), whose sum is σ = 52192140. Its totient is φ = 6537024.

The previous prime is 19787633. The next prime is 19787653. The reversal of 19787652 is 25678791.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 14561856 = 2286^2 + 3816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19787598 and 19787607.

It is not an unprimeable number, because it can be changed into a prime (19787653) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50674 + ... + 51062.

It is an arithmetic number, because the mean of its divisors is an integer number (869869).

Almost surely, 2^19787652 is an apocalyptic number.

19787652 is a gapful number since it is divisible by the number (12) 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 19787652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26096070).

19787652 is an abundant number, since it is smaller than the sum of its proper divisors (32404488).

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

19787652 is a wasteful number, since it uses less digits than its factorization.

19787652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 551 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 19787652 is about 4448.3313725486. The cubic root of 19787652 is about 270.4776729408.

The spelling of 19787652 in words is "nineteen million, seven hundred eighty-seven thousand, six hundred fifty-two".