19662020 has 24 divisors (see below), whose sum is σ = 47189184. Its totient is φ = 6741216.

The previous prime is 19661989. The next prime is 19662023. The reversal of 19662020 is 2026691.

It is not an unprimeable number, because it can be changed into a prime (19662023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70082 + ... + 70361.

It is an arithmetic number, because the mean of its divisors is an integer number (1966216).

Almost surely, 2^19662020 is an apocalyptic number.

19662020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19662020 is an abundant number, since it is smaller than the sum of its proper divisors (27527164).

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

19662020 is a wasteful number, since it uses less digits than its factorization.

19662020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140459 (or 140457 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 19662020 is about 4434.1876369861. The cubic root of 19662020 is about 269.9040353975.

The spelling of 19662020 in words is "nineteen million, six hundred sixty-two thousand, twenty".