15742021454 has 32 divisors (see below), whose sum is σ = 25998498720. Its totient is φ = 7115415552.

The previous prime is 15742021453. The next prime is 15742021511. The reversal of 15742021454 is 45412024751.

It is a super-2 number, since 2×15742021454² (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 (15742021453) 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, 148937 + ... + 231659.

It is an arithmetic number, because the mean of its divisors is an integer number (812453085).

Almost surely, 2^15742021454 is an apocalyptic number.

15742021454 is a deficient number, since it is larger than the sum of its proper divisors (10256477266).

15742021454 is a wasteful number, since it uses less digits than its factorization.

15742021454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82964.

The product of its (nonzero) digits is 44800, while the sum is 35.

The spelling of 15742021454 in words is "fifteen billion, seven hundred forty-two million, twenty-one thousand, four hundred fifty-four".