20151572043 has 16 divisors (see below), whose sum is σ = 27128618496. Its totient is φ = 13304534880.

The previous prime is 20151572033. The next prime is 20151572053. The reversal of 20151572043 is 34027515102.

It is an interprime number because it is at equal distance from previous prime (20151572033) and next prime (20151572053).

It is not a de Polignac number, because 20151572043 - 2⁵ = 20151572011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20151572043.

It is not an unprimeable number, because it can be changed into a prime (20151572033) 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, 1218973 + ... + 1235393.

It is an arithmetic number, because the mean of its divisors is an integer number (1695538656).

Almost surely, 2^20151572043 is an apocalyptic number.

20151572043 is a deficient number, since it is larger than the sum of its proper divisors (6977046453).

20151572043 is a wasteful number, since it uses less digits than its factorization.

20151572043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20354.

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20151572043 in words is "twenty billion, one hundred fifty-one million, five hundred seventy-two thousand, forty-three".