19621436970 has 32 divisors (see below), whose sum is σ = 47193632640. Its totient is φ = 5221029440.

The previous prime is 19621436969. The next prime is 19621436987. The reversal of 19621436970 is 7963412691.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695550 + ... + 723209.

It is an arithmetic number, because the mean of its divisors is an integer number (1474801020).

Almost surely, 2^19621436970 is an apocalyptic number.

19621436970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19621436970 is an abundant number, since it is smaller than the sum of its proper divisors (27572195670).

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

19621436970 is a wasteful number, since it uses less digits than its factorization.

19621436970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419230.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 19621436970 in words is "nineteen billion, six hundred twenty-one million, four hundred thirty-six thousand, nine hundred seventy".