19797534 has 20 divisors (see below), whose sum is σ = 44361504. Its totient is φ = 6599124.

The previous prime is 19797529. The next prime is 19797539. The reversal of 19797534 is 43579791.

It is an interprime number because it is at equal distance from previous prime (19797529) and next prime (19797539).

It is a self number, because there is not a number n which added to its sum of digits gives 19797534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19797539) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60942 + ... + 61265.

Almost surely, 2^19797534 is an apocalyptic number.

19797534 is an abundant number, since it is smaller than the sum of its proper divisors (24563970).

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

19797534 is a wasteful number, since it uses less digits than its factorization.

19797534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122221 (or 122212 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 19797534 is about 4449.4419874856. The cubic root of 19797534 is about 270.5226911764.

The spelling of 19797534 in words is "nineteen million, seven hundred ninety-seven thousand, five hundred thirty-four".