1421663020 has 48 divisors (see below), whose sum is σ = 3021590880. Its totient is φ = 561821184.

The previous prime is 1421662993. The next prime is 1421663053. The reversal of 1421663020 is 203661241.

It is a super-2 number, since 2×1421663020² = 4042251484871040800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995547 + ... + 996973.

It is an arithmetic number, because the mean of its divisors is an integer number (62949810).

Almost surely, 2^1421663020 is an apocalyptic number.

1421663020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421663020 is an abundant number, since it is smaller than the sum of its proper divisors (1599927860).

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

1421663020 is a wasteful number, since it uses less digits than its factorization.

1421663020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1421663020 is about 37704.9468902954. The cubic root of 1421663020 is about 1124.4294773034.

The spelling of 1421663020 in words is "one billion, four hundred twenty-one million, six hundred sixty-three thousand, twenty".