19770480 has 160 divisors (see below), whose sum is σ = 69549120. Its totient is φ = 5225472.

The previous prime is 19770479. The next prime is 19770551. The reversal of 19770480 is 8407791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174904 + ... + 175016.

It is an arithmetic number, because the mean of its divisors is an integer number (434682).

Almost surely, 2^19770480 is an apocalyptic number.

19770480 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 19770480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34774560).

19770480 is an abundant number, since it is smaller than the sum of its proper divisors (49778640).

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

19770480 is an equidigital number, since it uses as much as digits as its factorization.

19770480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 19770480 is about 4446.4007916516. The cubic root of 19770480 is about 270.3994088663.

The spelling of 19770480 in words is "nineteen million, seven hundred seventy thousand, four hundred eighty".