19230981 has 32 divisors (see below), whose sum is σ = 32640000. Its totient is φ = 9984240.

The previous prime is 19230971. The next prime is 19231001. The reversal of 19230981 is 18903291.

It is not a de Polignac number, because 19230981 - 2⁶ = 19230917 is a prime.

It is a super-2 number, since 2×19230981² = 739661260444722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19230941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10470 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (1020000).

Almost surely, 2^19230981 is an apocalyptic number.

19230981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19230981 is a deficient number, since it is larger than the sum of its proper divisors (13409019).

19230981 is a wasteful number, since it uses less digits than its factorization.

19230981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 19230981 is about 4385.3142418759. The cubic root of 19230981 is about 267.9171283458.

The spelling of 19230981 in words is "nineteen million, two hundred thirty thousand, nine hundred eighty-one".