19795640 has 32 divisors (see below), whose sum is σ = 46478880. Its totient is φ = 7573632.

The previous prime is 19795637. The next prime is 19795651. The reversal of 19795640 is 4659791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9839 + ... + 11678.

It is an arithmetic number, because the mean of its divisors is an integer number (1452465).

Almost surely, 2^19795640 is an apocalyptic number.

19795640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19795640 is an abundant number, since it is smaller than the sum of its proper divisors (26683240).

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

19795640 is a wasteful number, since it uses less digits than its factorization.

19795640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21551 (or 21547 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 19795640 is about 4449.2291467174. The cubic root of 19795640 is about 270.5140640697.

The spelling of 19795640 in words is "nineteen million, seven hundred ninety-five thousand, six hundred forty".