19900221627 has 16 divisors (see below), whose sum is σ = 31172375808. Its totient is φ = 11132990880.

The previous prime is 19900221617. The next prime is 19900221643. The reversal of 19900221627 is 72612200991.

It is not a de Polignac number, because 19900221627 - 2⁸ = 19900221371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (19900221617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23193303 + ... + 23194160.

It is an arithmetic number, because the mean of its divisors is an integer number (1948273488).

Almost surely, 2^19900221627 is an apocalyptic number.

19900221627 is a deficient number, since it is larger than the sum of its proper divisors (11272154181).

19900221627 is a wasteful number, since it uses less digits than its factorization.

19900221627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46387490.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 19900221627 in words is "nineteen billion, nine hundred million, two hundred twenty-one thousand, six hundred twenty-seven".