19970458 has 4 divisors (see below), whose sum is σ = 29955690. Its totient is φ = 9985228.

The previous prime is 19970449. The next prime is 19970459. The reversal of 19970458 is 85407991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85407991 = 61 ⋅1400131.

It can be written as a sum of positive squares in only one way, i.e., 18861649 + 1108809 = 4343^2 + 1053^2 .

It is not an unprimeable number, because it can be changed into a prime (19970459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992613 + ... + 4992616.

Almost surely, 2^19970458 is an apocalyptic number.

19970458 is a deficient number, since it is larger than the sum of its proper divisors (9985232).

19970458 is an equidigital number, since it uses as much as digits as its factorization.

19970458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9985231.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 19970458 is about 4468.8318384115. The cubic root of 19970458 is about 271.3080469258.

The spelling of 19970458 in words is "nineteen million, nine hundred seventy thousand, four hundred fifty-eight".