19770534 has 64 divisors (see below), whose sum is σ = 50657280. Its totient is φ = 5598720.

The previous prime is 19770479. The next prime is 19770551. The reversal of 19770534 is 43507791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72819 + ... + 73089.

It is an arithmetic number, because the mean of its divisors is an integer number (791520).

Almost surely, 2^19770534 is an apocalyptic number.

19770534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19770534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25328640).

19770534 is an abundant number, since it is smaller than the sum of its proper divisors (30886746).

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

19770534 is a wasteful number, since it uses less digits than its factorization.

19770534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 19770534 is about 4446.4068639746. The cubic root of 19770534 is about 270.3996550507.

The spelling of 19770534 in words is "nineteen million, seven hundred seventy thousand, five hundred thirty-four".