21001501046 has 8 divisors (see below), whose sum is σ = 31502921880. Its totient is φ = 10500527088.

The previous prime is 21001501007. The next prime is 21001501049. The reversal of 21001501046 is 64010510012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001501049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56330 + ... + 212546.

It is an arithmetic number, because the mean of its divisors is an integer number (3937865235).

Almost surely, 2^21001501046 is an apocalyptic number.

21001501046 is a deficient number, since it is larger than the sum of its proper divisors (10501420834).

21001501046 is a wasteful number, since it uses less digits than its factorization.

21001501046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223438.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 21001501046 in words is "twenty-one billion, one million, five hundred one thousand, forty-six".