21434400501 has 8 divisors (see below), whose sum is σ = 28586088960. Its totient is φ = 14286156192.

The previous prime is 21434400469. The next prime is 21434400523. The reversal of 21434400501 is 10500443412.

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

It is not a de Polignac number, because 21434400501 - 2⁵ = 21434400469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434400541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846480 + ... + 871433.

It is an arithmetic number, because the mean of its divisors is an integer number (3573261120).

Almost surely, 2^21434400501 is an apocalyptic number.

It is an amenable number.

21434400501 is a deficient number, since it is larger than the sum of its proper divisors (7151688459).

21434400501 is a wasteful number, since it uses less digits than its factorization.

21434400501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722075.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21434400501 its reverse (10500443412), we get a palindrome (31934843913).

The spelling of 21434400501 in words is "twenty-one billion, four hundred thirty-four million, four hundred thousand, five hundred one".