19472046621 has 16 divisors (see below), whose sum is σ = 27422485440. Its totient is φ = 12256151040.

The previous prime is 19472046617. The next prime is 19472046623. The reversal of 19472046621 is 12664027491.

It is not a de Polignac number, because 19472046621 - 2² = 19472046617 is a prime.

It is a super-2 number, since 2×19472046621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19472046623) 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, 566260 + ... + 599661.

It is an arithmetic number, because the mean of its divisors is an integer number (1713905340).

Almost surely, 2^19472046621 is an apocalyptic number.

It is an amenable number.

19472046621 is a deficient number, since it is larger than the sum of its proper divisors (7950438819).

19472046621 is a wasteful number, since it uses less digits than its factorization.

19472046621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166236.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 19472046621 in words is "nineteen billion, four hundred seventy-two million, forty-six thousand, six hundred twenty-one".