19942550 has 24 divisors (see below), whose sum is σ = 37653096. Its totient is φ = 7856640.

The previous prime is 19942543. The next prime is 19942567. The reversal of 19942550 is 5524991.

It is a self number, because there is not a number n which added to its sum of digits gives 19942550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374 + ... + 6326.

It is an arithmetic number, because the mean of its divisors is an integer number (1568879).

Almost surely, 2^19942550 is an apocalyptic number.

19942550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19942550 is a deficient number, since it is larger than the sum of its proper divisors (17710546).

19942550 is a wasteful number, since it uses less digits than its factorization.

19942550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6032 (or 6027 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 19942550 is about 4465.7082305050. The cubic root of 19942550 is about 271.1816069153.

The spelling of 19942550 in words is "nineteen million, nine hundred forty-two thousand, five hundred fifty".