19976880 has 320 divisors, whose sum is σ = 82280448. Its totient is φ = 3886080.

The previous prime is 19976863. The next prime is 19976893. The reversal of 19976880 is 8867991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 425017 + ... + 425063.

Almost surely, 2^19976880 is an apocalyptic number.

19976880 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 19976880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41140224).

19976880 is an abundant number, since it is smaller than the sum of its proper divisors (62303568).

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

19976880 is a wasteful number, since it uses less digits than its factorization.

19976880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 19976880 is about 4469.5503129510. The cubic root of 19976880 is about 271.3371257706.

Subtracting from 19976880 its reverse (8867991), we obtain a square (11108889 = 3333²).

The spelling of 19976880 in words is "nineteen million, nine hundred seventy-six thousand, eight hundred eighty".