19970051 has 4 divisors (see below), whose sum is σ = 19990104. Its totient is φ = 19950000.

The previous prime is 19970039. The next prime is 19970057. The reversal of 19970051 is 15007991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15007991 = 17 ⋅882823.

It is a cyclic number.

It is not a de Polignac number, because 19970051 - 2⁶ = 19969987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19970057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8450 + ... + 10551.

It is an arithmetic number, because the mean of its divisors is an integer number (4997526).

Almost surely, 2^19970051 is an apocalyptic number.

19970051 is a deficient number, since it is larger than the sum of its proper divisors (20053).

19970051 is a wasteful number, since it uses less digits than its factorization.

19970051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 19970051 is about 4468.7863005519. The cubic root of 19970051 is about 271.3062038179.

The spelling of 19970051 in words is "nineteen million, nine hundred seventy thousand, fifty-one".